Organic electroluminescent material and device thereof
Provided are an organic electroluminescent material and a device thereof. The organic electroluminescent material is a metal complex including a ligand L a having a structure of Formula 1, and the metal complex can be used as luminescent materials in electroluminescent devices. These new compounds, when used in electroluminescent devices, can show better performance, provide lower device voltage and higher device efficiency, and significantly improve the comprehensive performance of devices. Further provided are an electroluminescent device including the metal complex and a compound composition including the metal complex.
1 . A metal complex, comprising a metal M and a ligand L a coordinated with the metal M, wherein the metal M is selected from metals having a relative atomic mass greater than 40, and L a has a structure represented by Formula 1:
wherein in Formula 1,
Cy is, at each occurrence identically or differently, selected from a substituted or unsubstituted aromatic ring having 6 to 24 ring atoms, a substituted or unsubstituted heteroaromatic ring having 5 to 24 ring atoms or combinations thereof;
X is selected from the group consisting of O, S, Se, NR′, CR′R′, SiR′R′, and GeR′R′; when two R′ are present, the two R′ are identical or different;
X 1 to X 7 are, at each occurrence identically or differently, selected from C, CR x or N; at least one of X 1 to X 4 is C and is attached to Cy;
X 1 , X 2 , X 3 or X 4 is attached to the metal M through a metal-carbon bond or a metal-nitrogen bond;
at least one of X 1 to X 7 is CR x , wherein the R x is cyano or fluorine;
A has a structure represented by Formula 2:
wherein a is selected from 1;
A 1 is, at each occurrence identically or differently, selected from the group consisting of the following groups unsubstituted or substituted by one or at least two R a1 : alkylene having 1 to 20 carbon atoms, heteroalkylene having 1 to 20 carbon atoms, cycloalkylene having 3 to 20 carbon atoms, heterocyclene having 3 to 20 ring atoms, phenylene, and heteroarylene having 5 to 6 ring atoms, and combinations thereof;
A 2 is, at each occurrence identically or differently, selected from the group consisting of the following groups unsubstituted or substituted by one or at least two R a2 : cycloalkylene having 3 to 20 carbon atoms, heterocyclene having 3 to 20 ring atoms, and combinations thereof;
R′, R x , R a1 , R a2 , and R a3 are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R′, R x , R a2 , R a3 can be optionally joined to form a ring;
the length of A is at least 6.7 Å;
“*” represents a position where A is attached;
when A 1 is selected from phenylene unsubstituted or substituted by one or at least two R a1 or heteroarylene having 5 to 6 ring atoms unsubstituted or substituted by one or at least two R a1 , A 2 and R a1 need to satisfy the following conditions:
1) A 2 that is directly attached to A 1 is, at each occurrence identically or differently, selected from the group consisting of: following groups unsubstituted or substituted by one or at least two R a2 : cycloalkylene having 3 to 20 carbon atoms and heterocyclene having 3 to 20 ring atoms, and combinations thereof; and
2) R a1 is, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof.
2 . The metal complex of claim 1 , wherein A 1 is, at each occurrence identically or differently, selected from phenylene unsubstituted or substituted by one or at least two R a1 or heteroarylene having 5 to 6 ring atoms unsubstituted or substituted by one or at least two R a1 ; A 2 is, at each occurrence identically or differently, selected from the group consisting of the following groups following groups unsubstituted or substituted by one or at least two R a2 : cycloalkylene having 3 to 20 ring carbon atoms and heterocyclene having 3 to 20 ring atoms, and combinations thereof.
3 . The metal complex of claim 1 , wherein A 1 is, at each occurrence identically or differently, selected from the group consisting of the following groups unsubstituted or substituted by one or at least two R a1 : alkylene having 1 to 20 carbon atoms, heteroalkylene having 1 to 20 carbon atoms, cycloalkylene having 3 to 20 carbon atoms and heterocyclene having 3 to 20 ring atoms, and combinations thereof; A 2 is, at each occurrence identically or differently, selected from following groups unsubstituted or substituted by one or at least two R a2 : cycloalkylene having 3 to 20 carbon atoms, heterocyclene having 3 to 20 ring atoms, and combinations thereof.
4 . The metal complex of claim 1 , wherein Cy is selected from any one of the group consisting of the following structures:
wherein,
R represents, at each occurrence identically or differently, mono-substitution, multiple substitutions or no substitution; when a plurality of R are present in any one of those structures, the plurality of R are identical or different;
R is, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, a cyano group, an isocyano group, and combinations thereof;
two adjacent substituents R can be optionally joined to form a ring;
“#” represents a position where the metal M is attached, and
represents a position where X 1 , X 2 , X 3 or X 4 is attached.
5 . The metal complex of claim 1 , wherein the metal complex has a general formula of M(L a ) m (L b ) n (L c ) q ;
wherein,
M is, at each occurrence identically or differently, selected from the group consisting of Cu, Ag, Au, Ru, Rh, Pd, Os, Ir, and Pt;
L a , L b , and L c are a first ligand, a second ligand and a third ligand coordinated to the metal M, respectively, and L c is identical to or different from L a or L b ; wherein L a , L b , and L c can be optionally joined to form a multidentate ligand;
m is selected from 1, 2 or 3, n is selected from 0, 1 or 2, q is selected from 0, 1 or 2, and m+n+q equals an oxidation state of the metal M; when m is greater than or equal to 2, a plurality of L a are identical or different; when n is equal to 2, two L b are identical or different; when q is equal to 2, two L c are identical or different;
L a is, at each occurrence identically or differently, selected from the group consisting of:
X is selected from the group consisting of O, S, Se, NR′, CR′R′, SiR′R′, and GeR′R′; when two R′ are present, the two R′ are identical or different;
R and R x represent, at each occurrence identically or differently, mono-substitution, multiple substitutions or no substitution;
at least one of R x is fluorine or cyano;
A has a structure represented by Formula 2:
wherein a is selected from 1, 2, 3, 4 or 5;
A 1 is, at each occurrence identically or differently, selected from the group consisting of the following groups unsubstituted or substituted by one or at least two R a1 : alkylene having 1 to 20 carbon atoms, heteroalkylene having 1 to 20 carbon atoms, cycloalkylene having 3 to 20 carbon atoms, heterocyclene having 3 to 20 ring atoms, phenylene and heteroarylene having 5 to 6 ring atoms, and combinations thereof;
A 2 is, at each occurrence identically or differently, selected from the group consisting of the following groups unsubstituted or substituted by one or at least two R a2 : cycloalkylene having 3 to 20 carbon atoms, heterocyclene having 3 to 20 ring atoms, and combinations thereof;
R, R′, R″, R x , R a1 , R a2 , and R a3 are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R, R′, R″, R x , R a2 , R a3 can be optionally joined to form a ring;
the length of A is at least 6.7 Å;
“*” represents a position where A is attached;
when A 1 is selected from phenylene unsubstituted or substituted by one or at least two Ral or heteroarylene having 5 to 6 ring atoms unsubstituted or substituted by one or at least two R a1 , A 2 and R a1 need to satisfy the following conditions:
1) A 2 that is directly attached to A 1 is, at each occurrence identically or differently, selected from the group consisting of: cycloalkylene having 3 to 20 carbon atoms unsubstituted or substituted by one or at least two R a2 , heterocyclene having 3 to 20 ring atoms unsubstituted or substituted by one or at least two R a2 , and combinations thereof; and
2) R a1 is, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
L b and L c are, at each occurrence identically or differently, selected from the group consisting of the following structures:
wherein,
R a and R b represent, at each occurrence identically or differently, mono-substitution, multiple substitutions or no substitution;
X b is, at each occurrence identically or differently, selected from the group consisting of: O, S, Se, NR N1 , and CR C1 R C2 ;
R a , R b , R c , R N1 , R C1 , and R C2 are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R a , R b , R c , R N1 , R C1 , and R C2 can be optionally joined to form a ring.
6 . The metal complex of claim 5 , wherein L a is, at each occurrence identically or differently, selected from the group consisting of:
7 . The metal complex of claim 6 , wherein L b is, at each occurrence identically or differently, selected from the group consisting of:
8 . The metal complex of claim 7 , wherein Le is, at each occurrence identically or differently, selected from the group consisting of:
9 . The metal complex of claim 8 , wherein the metal complex has a structure of Ir(L a ) 2 (L b ) or Ir(L a )(L b ) 2 or Ir(L a ) 3 , wherein L a is, at each occurrence identically or differently, selected from any one or any two or any three of the group consisting of L a12 to L a77 , L a91 to L a94 , L a98 to L a102 , L a111 to L a114 , L a142 to L a150 , L a153 to L a173 , L a177 to L a192 , L a195 to L a200 , L a229 to L a306 , L a327 to L a360 , L a381 to L a456 , L a466 to L a477 , L a482 to L a488 , L a490 , L a495 to L a501 , L a503 , L a517 to L a582 , L a596 to L a599 , L a603 to L a607 , L a616 to L a19 , L a647 to L a655 , L a670 to L a675 , L a678 to L a761 , L a782 to L a793 , L a804 to L a877 , L a887 to L a900 , L a903 to L a909 , L a911 to L a912 , L a916 to L a922 , L a924 , L a928 to L a934 , L a936 , L a938 , and L b is selected from any one or any two of the group consisting of L b1 to L b328 ; or
the metal complex has a structure of Ir(L a ) 2 (L c ) or Ir(L a )(L c ) 2 , wherein L a is, at each occurrence identically or differently, selected from any one or any two of the group consisting of L a12 to L a77 , L a91 to L a94 , L a98 to L a102 , L a111 to L a114 , L a142 to L a150 , L a153 to L a173 , L a177 to L a192 , L a195 to L a200 , L a229 to L a306 , L a327 to L a360 , L a381 to L a456 , L a466 to L a477 , L a482 to L a488 , L a490 , L a495 to L a501 , L a503 , L a517 to L a582 , L a596 to L a599 , L a603 to L a607 , L a616 to L a19 , L a647 to L a655 , L a670 to L a675 , L a678 to L a761 , L a782 to L a793 , L a804 to L a877 , L a887 to L a900 , L a903 to L a909 , L a911 to L a912 , L a916 to L a922 , L a924 , L a928 to L a934 , L a936 , L a938 , and L c is selected from any one or any two of the group consisting of L c1 to L c360 ; or
the metal complex has a structure of Ir(L a )(L b )(L c ), wherein L a is, at each occurrence identically or differently, selected from any one of the group consisting of L a12 to L a77 , L a91 to L a94 , L a98 to L a102 , L a111 to L a114 , L a142 to L a150 , L a153 to L a173 , L a177 to L a192 , L a195 to L a200 , L a229 to L a306 , L a327 to L a360 , L a381 to L a456 , L a466 to L a477 , L a482 to L a488 , L a490 , L a495 to L a501 , L a503 , L a517 to L a582 , L a596 to L a599 , L a603 to L a607 , L a616 to L a19 , L a647 to L a655 , L a670 to L a675 , L a678 to L a761 , L a782 to L a793 , L a804 to L a877 , L a887 to L a900 , L a903 to L a909 , L a911 to L a912 , L a916 to L a922 , L a924 , L a928 to L a934 , L a936 , L a938 , L b is selected from any one of the group consisting of L b1 to L b328 , and L c is selected from any one of the group consisting of L c1 to L c360 ;
wherein the metal complex is selected from the group consisting of metal complex 39 to metal complex 266, metal complex 305 to metal complex 1102, metal complex 1179 to metal complex 1824, metal complex 1863 to metal complex 1900, wherein metal complex 39 to metal complex 266, metal complex 305 to metal complex 1102, metal complex 1179 to metal complex 1824, metal complex 1863 to metal complex 1900 have a structure of IrL a (L b ) 2 , wherein two L b are identical, and L a and L b correspond to structures in the following table, respectively:
Metal
Metal
complex
L a
L b
complex
L a
L b
39
L a13
L b1
40
L a13
L b3
41
L a13
L b4
42
L a13
L b8
43
L a13
L b10
44
L a13
L b12
45
L a13
L b13
46
L a13
L b17
47
L a13
L b21
48
L a13
L b22
49
L a13
L b26
50
L a13
L b28
51
L a13
L b30
52
L a13
L b31
53
L a13
L b35
54
L a13
L b37
55
L a13
L b38
56
L a13
L b39
57
L a13
L b40
58
L a13
L b41
59
L a13
L b42
60
L a13
L b43
61
L a13
L b44
62
L a13
L b45
63
L a13
L b71
64
L a13
L b72
65
L a13
L b79
66
L a13
L b80
67
L a13
L b81
68
L a13
L b99
69
L a13
L b112
70
L a13
L b151
71
L a13
L b153
72
L a13
L b164
73
L a13
L b166
74
L a13
L b209
75
L a13
L b287
76
L a13
L b299
77
L a14
L b1
78
L a14
L b3
79
L a14
L b4
80
L a14
L b8
81
L a14
L b10
82
L a14
L b12
83
L a14
L b13
84
L a14
L b17
85
L a14
L b21
86
L a14
L b22
87
L a14
L b26
88
L a14
L b28
89
L a14
L b30
90
L a14
L b31
91
L a14
L b35
92
L a14
L b37
93
L a14
L b38
94
L a14
L b39
95
L a14
L b40
96
L a14
L b41
97
L a14
L b42
98
L a14
L b43
99
L a14
L b44
100
L a14
L b45
101
L a14
L b71
102
L a14
L b72
103
L a14
L b79
104
L a14
L b80
105
L a14
L b81
106
L a14
L b99
107
L a14
L b112
108
L a14
L b151
109
L a14
L b153
110
L a14
L b164
111
L a14
L b166
112
L a14
L b209
113
L a14
L b287
114
L a14
L b299
115
L a18
L b1
116
L a18
L b3
117
L a18
L b4
118
L a18
L b8
119
L a18
L b10
120
L a18
L b12
121
L a18
L b13
122
L a18
L b17
123
L a18
L b21
124
L a18
L b22
125
L a18
L b26
126
L a18
L b28
127
L a18
L b30
128
L a18
L b31
129
L a18
L b35
130
L a18
L b37
131
L a18
L b38
132
L a18
L b39
133
L a18
L b40
134
L a18
L b41
135
L a18
L b42
136
L a18
L b43
137
L a18
L b44
138
L a18
L b45
139
L a18
L b71
140
L a18
L b72
141
L a18
L b79
142
L a18
L b80
143
L a18
L b81
144
L a18
L b99
145
L a18
L b112
146
L a18
L b151
147
L a18
L b153
148
L a18
L b164
149
L a18
L b166
150
L a18
L b209
151
L a18
L b287
152
L a18
L b299
153
L a20
L b1
154
L a20
L b3
155
L a20
L b4
156
L a20
L b8
157
L a20
L b10
158
L a20
L b12
159
L a20
L b13
160
L a20
L b17
161
L a20
L b21
162
L a20
L b22
163
L a20
L b26
164
L a20
L b28
165
L a20
L b30
166
L a20
L b31
167
L a20
L b35
168
L a20
L b37
169
L a20
L b38
170
L a20
L b39
171
L a20
L b40
172
L a20
L b41
173
L a20
L b42
174
L a20
L b43
175
L a20
L b44
176
L a20
L b45
177
L a20
L b71
178
L a20
L b72
179
L a20
L b79
180
L a20
L b80
181
L a20
L b81
182
L a20
L b99
183
L a20
L b112
184
L a20
L b151
185
L a20
L b153
186
L a20
L b164
187
L a20
L b166
188
L a20
L b209
189
L a20
L b287
190
L a20
L b299
191
L a57
L b1
192
L a57
L b3
193
L a57
L b4
194
L a57
L b8
195
L a57
L b10
196
L a57
L b12
197
L a57
L b13
198
L a57
L b17
199
L a57
L b21
200
L a57
L b22
201
L a57
L b26
202
L a57
L b28
203
L a57
L b30
204
L a57
L b31
205
L a57
L b35
206
L a57
L b37
207
L a57
L b38
208
L a57
L b39
209
L a57
L b40
210
L a57
L b41
211
L a57
L b42
212
L a57
L b43
213
L a57
L b44
214
L a57
L b45
215
L a57
L b71
216
L a57
L b72
217
L a57
L b79
218
L a57
L b80
219
L a57
L b81
220
L a57
L b99
221
L a57
L b112
222
L a57
L b151
223
L a57
L b153
224
L a57
L b164
225
L a57
L b166
226
L a57
L b209
227
L a57
L b287
228
L a57
L b299
229
L a70
L b1
230
L a70
L b3
231
L a70
L b4
232
L a70
L b8
233
L a70
L b10
234
L a70
L b12
235
L a70
L b13
236
L a70
L b17
237
L a70
L b21
238
L a70
L b22
239
L a70
L b26
240
L a70
L b28
241
L a70
L b30
242
L a70
L b31
243
L a70
L b35
244
L a70
L b37
245
L a70
L b38
246
L a70
L b39
247
L a70
L b40
248
L a70
L b41
249
L a70
L b42
250
L a70
L b43
251
L a70
L b44
252
L a70
L b45
253
L a70
L b71
254
L a70
L b72
255
L a70
L b79
256
L a70
L b80
257
L a70
L b81
258
L a70
L b99
259
L a70
L b112
260
L a70
L b151
261
L a70
L b153
262
L a70
L b164
263
L a70
L b166
264
L a70
L b209
265
L a70
L b287
266
L a70
L b299
305
L a92
L b1
306
L a92
L b3
307
L a92
L b4
308
L a92
L b8
309
L a92
L b10
310
L a92
L b12
311
L a92
L b13
312
L a92
L b17
313
L a92
L b21
314
L a92
L b22
315
L a92
L b26
316
L a92
L b28
317
L a92
L b30
318
L a92
L b31
319
L a92
L b35
320
L a92
L b37
321
L a92
L b38
322
L a92
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L b26
1608
L a466
L b28
1609
L a466
L b30
1610
L a466
L b31
1611
L a466
L b35
1612
L a466
L b37
1613
L a466
L b38
1614
L a466
L b39
1615
L a466
L b40
1616
L a466
L b41
1617
L a466
L b42
1618
L a466
L b43
1619
L a466
L b44
1620
L a466
L b45
1621
L a466
L b71
1622
L a466
L b72
1623
L a466
L b79
1624
L a466
L b80
1625
L a466
L b81
1626
L a466
L b99
1627
L a466
L b112
1628
L a466
L b151
1629
L a466
L b153
1630
L a466
L b164
1631
L a466
L b166
1632
L a466
L b209
1633
L a466
L b287
1634
L a466
L b299
1635
L a518
L b1
1636
L a518
L b3
1637
L a518
L b4
1638
L a518
L b8
1639
L a518
L b10
1640
L a518
L b12
1641
L a518
L b13
1642
L a518
L b17
1643
L a518
L b21
1644
L a518
L b22
1645
L a518
L b26
1646
L a518
L b28
1647
L a518
L b30
1648
L a518
L b31
1649
L a518
L b35
1650
L a518
L b37
1651
L a518
L b38
1652
L a518
L b39
1653
L a518
L b40
1654
L a518
L b41
1655
L a518
L b42
1656
L a518
L b43
1657
L a518
L b44
1658
L a518
L b45
1659
L a518
L b71
1660
L a518
L b72
1661
L a518
L b79
1662
L a518
L b80
1663
L a518
L b81
1664
L a518
L b99
1665
L a518
L b112
1666
L a518
L b151
1667
L a518
L b153
1668
L a518
L b164
1669
L a518
L b166
1670
L a518
L b209
1671
L a518
L b287
1672
L a518
L b299
1673
L a519
L b1
1674
L a519
L b3
1675
L a519
L b4
1676
L a519
L b8
1677
L a519
L b10
1678
L a519
L b12
1679
L a519
L b13
1680
L a519
L b17
1681
L a519
L b21
1682
L a519
L b22
1683
L a519
L b26
1684
L a519
L b28
1685
L a519
L b30
1686
L a519
L b31
1687
L a519
L b35
1688
L a519
L b37
1689
L a519
L b38
1690
L a519
L b39
1691
L a519
L b40
1692
L a519
L b41
1693
L a519
L b42
1694
L a519
L b43
1695
L a519
L b44
1696
L a519
L b45
1697
L a519
L b71
1698
L a519
L b72
1699
L a519
L b79
1700
L a519
L b80
1701
L a519
L b81
1702
L a519
L b99
1703
L a519
L b112
1704
L a519
L b151
1705
L a519
L b153
1706
L a519
L b164
1707
L a519
L b166
1708
L a519
L b209
1709
L a519
L b287
1710
L a519
L b299
1711
L a525
L b1
1712
L a525
L b3
1713
L a525
L b4
1714
L a525
L b8
1715
L a525
L b10
1716
L a525
L b12
1717
L a525
L b13
1718
L a525
L b17
1719
L a525
L b21
1720
L a525
L b22
1721
L a525
L b26
1722
L a525
L b28
1723
L a525
L b30
1724
L a525
L b31
1725
L a525
L b35
1726
L a525
L b37
1727
L a525
L b38
1728
L a525
L b39
1729
L a525
L b40
1730
L a525
L b41
1731
L a525
L b42
1732
L a525
L b43
1733
L a525
L b44
1734
L a525
L b45
1735
L a525
L b71
1736
L a525
L b72
1737
L a525
L b79
1738
L a525
L b80
1739
L a525
L b81
1740
L a525
L b99
1741
L a525
L b112
1742
L a525
L b151
1743
L a525
L b153
1744
L a525
L b164
1745
L a525
L b166
1746
L a525
L b209
1747
L a525
L b287
1748
L a525
L b299
1749
L a562
L b1
1750
L a562
L b3
1751
L a562
L b4
1752
L a562
L b8
1753
L a562
L b10
1754
L a562
L b12
1755
L a562
L b13
1756
L a562
L b17
1757
L a562
L b21
1758
L a562
L b22
1759
L a562
L b26
1760
L a562
L b28
1761
L a562
L b30
1762
L a562
L b31
1763
L a562
L b35
1764
L a562
L b37
1765
L a562
L b38
1766
L a562
L b39
1767
L a562
L b40
1768
L a562
L b41
1769
L a562
L b42
1770
L a562
L b43
1771
L a562
L b44
1772
L a562
L b45
1773
L a562
L b71
1774
L a562
L b72
1775
L a562
L b79
1776
L a562
L b80
1777
L a562
L b81
1778
L a562
L b99
1779
L a562
L b112
1780
L a562
L b151
1781
L a562
L b153
1782
L a562
L b164
1783
L a562
L b166
1784
L a562
L b209
1785
L a562
L b287
1786
L a562
L b299
1787
L a575
L b1
1788
L a575
L b3
1789
L a575
L b4
1790
L a575
L b8
1791
L a575
L b10
1792
L a575
L b12
1793
L a575
L b13
1794
L a575
L b17
1795
L a575
L b21
1796
L a575
L b22
1797
L a575
L b26
1798
L a575
L b28
1799
L a575
L b30
1800
L a575
L b31
1801
L a575
L b35
1802
L a575
L b37
1803
L a575
L b38
1804
L a575
L b39
1805
L a575
L b40
1806
L a575
L b41
1807
L a575
L b42
1808
L a575
L b43
1809
L a575
L b44
1810
L a575
L b45
1811
L a575
L b71
1812
L a575
L b72
1813
L a575
L b79
1814
L a575
L b80
1815
L a575
L b81
1816
L a575
L b99
1817
L a575
L b112
1818
L a575
L b151
1819
L a575
L b153
1820
L a575
L b164
1821
L a575
L b166
1822
L a575
L b209
1823
L a575
L b287
1824
L a575
L b299
1863
L a597
L b1
1864
L a597
L b3
1865
L a597
L b4
1866
L a597
L b8
1867
L a597
L b10
1868
L a597
L b12
1869
L a597
L b13
1870
L a597
L b17
1871
L a597
L b21
1872
L a597
L b22
1873
L a597
L b26
1874
L a597
L b28
1875
L a597
L b30
1876
L a597
L b31
1877
L a597
L b35
1878
L a597
L b37
1879
L a597
L b38
1880
L a597
L b39
1881
L a597
L b40
1882
L a597
L b41
1883
L a597
L b42
1884
L a597
L b43
1885
L a597
L b44
1886
L a597
L b45
1887
L a597
L b71
1888
L a597
L b72
1889
L a597
L b79
1890
L a597
L b80
1891
L a597
L b81
1892
L a597
L b99
1893
L a597
L b112
1894
L a597
L b151
1895
L a597
L b153
1896
L a597
L b164
1897
L a597
L b166
1898
L a597
L b209
1899
L a597
L b287
1900
L a597
L b299.
10 . The metal complex of claim 1 , wherein the metal complex is Ir(L a ) m (L b ) 3-m and has a structure represented by Formula 3:
wherein,
m is selected from 1, 2 or 3; when m is selected from 1, two L b are identical or different;
when m is selected from 2 or 3, a plurality of L a are identical or different;
Y 1 to Y 4 are, at each occurrence identically or differently, selected from CR y or N;
X is selected from the group consisting of O, S, Se, NR′, CR′R′, SiR′R′, and GeR′R′; when two R′ are present, the two R′ are identical or different;
X 3 to X 7 are, at each occurrence identically or differently, selected from CR x or N;
at least one of X 3 to X 7 is CR x , wherein the R x is a cyano group or fluorine;
A has a structure represented by Formula 2:
wherein a is selected from 1;
A 1 is, at each occurrence identically or differently, selected from the group consisting of the following groups unsubstituted or substituted by one or at least two R a1 : alkylene having 1 to 20 carbon atoms, heteroalkylene having 1 to 20 carbon atoms, cycloalkylene having 3 to 20 carbon atoms, heterocyclene having 3 to 20 ring atoms, phenylene and heteroarylene having 5 to 6 ring atoms, and combinations thereof;
A 2 is, at each occurrence identically or differently, selected from the group consisting of the following groups unsubstituted or substituted by one or at least two R a2 : cycloalkylene having 3 to 20 carbon atoms, heterocyclene having 3 to 20 ring atoms, and combinations thereof;
R′, R x , R y , R a1 , R a2 , R a3 , and R 1 to R 8 are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R 1 to R 8 can be optionally joined to form a ring;
adjacent substituents R′, R x , R y , R a2 , R a3 can be optionally joined to form a ring;
the length of A is at least 6.7 Å;
“*” represents a position where A is attached;
when A 1 is, at each occurrence identically or differently, selected from phenylene unsubstituted or substituted by one or at least two R a1 or heteroarylene having 5 to 6 ring atoms unsubstituted or substituted by one or at least two R a1 , A 2 and R a1 need to satisfy the following conditions:
1) A 2 that is directly attached to A 1 is, at each occurrence identically or differently, selected from the group consisting of: cycloalkylene having 3 to 20 carbon atoms unsubstituted or substituted by one or at least two R a2 , heterocyclene having 3 to 20 ring atoms unsubstituted or substituted by one or at least two R a2 , and combinations thereof; and
2) R a1 is, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof.
11 . The metal complex of claim 10 , wherein X 3 to X 7 are, at each occurrence identically or differently, selected from CR x ; and/or Y 1 to Y 4 are, at each occurrence identically or differently, selected from CR y .
12 . The metal complex of claim 10 , wherein at least one of X 3 to X 7 is N, and/or at least one of Y 1 to Y 4 is N.
13 . The metal complex of claim 10 , wherein at least one of X 3 to X 7 is CR x , wherein the R x is cyano or fluorine; remaining R x are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, a cyano group, and combinations thereof.
14 . The metal complex of claim 10 , wherein R y is, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, and combinations thereof.
15 . The metal complex of claim 10 , wherein at least one or at least two of R 5 to R 8 is (are), at each occurrence identically or differently, selected from substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms or combinations thereof, and the total number of carbon atoms in all R 5 to R 8 is at least 4.
16 . The metal complex of claim 10 , wherein at least one or at least two or at least three or all of R 2 , R 3 , R 6 , and R 7 is (are) selected from the group consisting of: deuterium, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, and combinations thereof.
17 . The metal complex of claim 10 , wherein X 7 is CR x , wherein the R x is cyano or fluorine; remaining R x are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, substituted or unsubstituted alkyl having 1 to 6 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 6 ring carbon atoms, and combinations thereof.
18 . The metal complex of claim 10 , wherein at least one R y is selected from the group consisting of: deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, and combinations thereof.
19 . The metal complex of claim 1 , wherein X is selected from O or S.
20 . The metal complex of claim 1 , wherein R a1 is, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 4 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, a hydroxyl group, a sulfanyl group, and combinations thereof.
21 . The metal complex of claim 1 , wherein R a2 and R a3 are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, a hydroxyl group, a sulfanyl group, and combinations thereof.
22 . The metal complex of claim 1 , wherein A is, at each occurrence identically or differently, selected from the group consisting of:
and combinations thereof;
optionally, hydrogen in the above groups can be partially or fully substituted with deuterium; wherein “*” represents a position where A is attached.
23 . An electroluminescent device, comprising:
an anode,
a cathode, and
an organic layer disposed between the anode and the cathode, wherein the organic layer comprises the metal complex of claim 1 .
24 . The electroluminescent device of claim 23 , wherein the organic layer comprising the metal complex is an emissive layer.
25 . The electroluminescent device of claim 24 , wherein the electroluminescent device emits green light or white light.
26 . The electroluminescent device of claim 24 , wherein the emissive layer comprises a first host compound;
the emissive layer further comprises a second host compound;
the first host compound and/or the second host compound comprise at least one chemical group selected from the group consisting of: benzene, pyridine, pyrimidine, triazine, carbazole, azacarbazole, indolocarbazole, dibenzothiophene, azadibenzothiophene, dibenzofuran, azadibenzofuran, dibenzoselenophene, triphenylene, azatriphenylene, fluorene, silafluorene, naphthalene, quinoline, isoquinoline, quinazoline, quinoxaline, phenanthrene, azaphenanthrene, and combinations thereof.
27 . The electroluminescent device of claim 26 , wherein the first host compound has a structure represented by Formula 4:
wherein,
E 1 to E 6 are, at each occurrence identically or differently, selected from C, CR e or N, at least two of E 1 to E 6 are N, and at least one of E 1 to E 6 is C and is attached to Formula A:
wherein,
Q is, at each occurrence identically or differently, selected from the group consisting of O, S, Se, N, NR″, CR″R″, SiR “R”, GeR “R”, and R′″C═CR″; when two R″ are present, the two R″ can be identical or different;
p is 0 or 1; r is 0 or 1;
when Q is selected from N, p is 0, and r is 1;
when Q is selected from the group consisting of O, S, Se, NR″, CR″R″, SiR′″R′″, GeR′″R′″, and R′″C═CR′″, p is 1, and r is 0;
L is, at each occurrence identically or differently, selected from a single bond, substituted or unsubstituted alkylene having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkylene having 3 to 20 carbon atoms, substituted or unsubstituted arylene having 6 to 20 carbon atoms, substituted or unsubstituted heteroarylene having 3 to 20 carbon atoms or combinations thereof;
Q 1 to Q 8 are, at each occurrence identically or differently, selected from C, CR q or N;
R e , R′″, and R q are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
“*” represents a position where Formula A is attached to Formula 4;
adjacent substituents R e , R′″, R q can be optionally joined to form a ring.
28 . The electroluminescent device of claim 27 , wherein E 1 to E 6 are, at each occurrence identically or differently, selected from C, CR e or N; wherein three of E 1 to E 6 are N, and at least one of E 1 to E 6 is CR e wherein the R e is, at each occurrence identically or differently, selected from the group consisting of: substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, and combinations thereof; and/or
Q is, at each occurrence identically or differently, selected from O, S, N or NR′″; and/or
R′″ is, at each occurrence identically or differently, selected from substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms or combinations thereof; and/or
at least one or at least two of Q 1 to Q 8 is (are) selected from CR q , wherein the R q is selected from substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 5 to 30 carbon atoms or combinations thereof; and/or
L is, at each occurrence identically or differently, selected from a single bond, substituted or unsubstituted arylene having 6 to 20 carbon atoms, substituted or unsubstituted heteroarylene having 3 to 20 carbon atoms or combinations thereof.
29 . The electroluminescent device of claim 27 , wherein the first host compound is selected from the group consisting of:
30 . The electroluminescent device of claim 26 , wherein the second host compound has a structure represented by Formula 5:
wherein,
L x is, at each occurrence identically or differently, selected from a single bond, substituted or unsubstituted alkylene having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkylene having 3 to 20 carbon atoms, substituted or unsubstituted arylene having 6 to 20 carbon atoms, substituted or unsubstituted heteroarylene having 3 to 20 carbon atoms or combinations thereof;
V is, at each occurrence identically or differently, selected from C, CR v or N, and at least one of V is C and is attached to L x ;
U is, at each occurrence identically or differently, selected from C, CR u or N, and at least one of U is C and is attached to L x ;
R v and R u are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
Ar 6 is, at each occurrence identically or differently, selected from substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms or combinations thereof;
adjacent substituents R v and R u can be optionally joined to form a ring;
the second host compound has a structure represented by one of Formula 5-a to Formula 5-j:
31 . The electroluminescent device of claim 30 , wherein the second host compound is selected from the group consisting of:
32 . The electroluminescent device of claim 26 , wherein the metal complex is doped in the first host compound and the second host compound, and
the weight of the metal complex accounts for 3% to 13% of the total weight of the emissive layer.
33 . A compound composition, comprising the metal complex of claim 1 .
34 . The metal complex of claim 1 , wherein A 1 is, at each occurrence identically or differently, selected from phenylene unsubstituted or substituted by one or at least two R a1 ; A 2 is, at each occurrence identically or differently, selected from cycloalkylene having 5 to 12 ring carbon atoms unsubstituted or substituted by one or at least two R a2 , heterocyclene unsubstituted or substituted by one or at least two R a2 and having 5 to 12 ring atoms or combinations thereof.
35 . The metal complex of claim 1 , wherein A 1 is, at each occurrence identically or differently, selected from the group consisting of the following groups unsubstituted or substituted by one or at least two R a1 : cycloalkylene having 3 to 10 carbon atoms and heterocyclene having 3 to 10 ring atoms, and combinations thereof; A 2 is, at each occurrence identically or differently, selected from following groups unsubstituted or substituted by one or at least two R a2 : cycloalkylene having 3 to 10 carbon atoms, heterocyclene having 3 to 10 ring atoms, and combinations thereof.
36 . The metal complex of claim 1 , wherein R a1 is, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, fluorine, methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, t-butyl, cyclopentyl, cyclohexyl, deuterated methyl, deuterated ethyl, deuterated propyl, deuterated isopropyl, deuterated n-butyl, deuterated isobutyl, deuterated t-butyl, deuterated cyclopentyl, deuterated cyclohexyl, trimethylsilyl, and combinations thereof.
37 . The metal complex of claim 1 , wherein R a2 and R a3 are, at each occurrence identically or differently, selected from the group consisting of: hydrogen, deuterium, fluorine, methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, t-butyl, cyclopentyl, cyclohexyl, deuterated methyl, deuterated ethyl, deuterated propyl, deuterated isopropyl, deuterated n-butyl, deuterated isobutyl, deuterated t-butyl, deuterated cyclopentyl, deuterated cyclohexyl, phenyl, pyridyl, trimethylsilyl, and combinations thereof.