PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
The present disclosure relates to a plurality of host materials comprising a first host material comprising a compound represented by formula 1, and a second host material comprising a compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds of the present disclosure as host materials, it is possible to provide an organic electroluminescent device having higher luminous efficiency and/or longer lifetime properties as compared with a conventional organic electroluminescent device.
1 . A plurality of host materials comprising a first host material and a second host material, wherein the first host material comprises a compound represented by the following formula 1:
wherein,
X 1 and Y 1 , each independently, represent —N═, —NR 5 —, —O— or —S—, with a proviso that any one of X 1 and Y 1 represents —N═, and the other one represents —NR 5 —, —O— or —S—;
L 1 represents a single bond, or a substituted or unsubstituted (C6-C30)arylene;
Ar represents a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino, or a substituted or unsubstituted (C6-C30)aryl(3- to 30-membered)heteroarylamino;
R 1 represents a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
R 2 to R 5 , each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, or a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino; or adjacent ones of R 2 to R 5 may be linked to each other to form a ring(s);
a represents an integer of 1; b and c, each independently, represent an integer of 1 or 2; d represents an integer of 1 to 3; where if b to d, each independently, are an integer of 2 or more, each of R 2 to each of R 4 may be the same or different; and
the second host material comprises a compound represented by the following formula 2:
wherein,
HAr represents a substituted or unsubstituted (3- to 30-membered)heteroaryl;
L 2 represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene;
R 21 and R 22 , each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, —NR 11 R 12 , or —SiR 13 R 14 R 15 ; or adjacent R 21 's or adjacent R 22 's, each independently, may be linked to each other to form a ring(s), with a proviso that at least one ring is formed;
R 11 to R 15 , each independently, represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl; and
e and f, each independently, represent an integer of 1 to 4; where if e and f, each independently, are an integer of 2 or more, each of R 21 and each of R 22 may be the same or different.
2 . The plurality of host materials according to claim 1 , wherein the substituents of the substituted alkyl, the substituted aryl, the substituted arylene, the substituted heteroaryl, the substituted heteroarylene, the substituted cycloalkyl, the substituted cycloalkenyl, the substituted heterocycloalkyl, the substituted alkoxy, the substituted trialkylsilyl, the substituted dialkylarylsilyl, the substituted alkyldiarylsilyl, the substituted triarylsilyl, the substituted mono- or di-alkylamino, the substituted mono- or di-arylamino, and the substituted alkylarylamino, each independently, are at least one selected from the group consisting of deuterium; a halogen; a cyano; a carboxyl; a nitro; a hydroxyl; a (C1-C30)alkyl; a halo(C1-C30)alkyl; a (C2-C30)alkenyl; a (C2-C30)alkynyl; a (C1-C30)alkoxy; a (C1-C30)alkylthio; a (C3-C30)cycloalkyl; a (C3-C30)cycloalkenyl; a (3- to 7-membered)heterocycloalkyl; a (C6-C30)aryloxy; a (C6-C30)arylthio; a (3- to 30-membered)heteroaryl unsubstituted or substituted with a (C6-C30)aryl(s); a (C6-C30)aryl unsubstituted or substituted with a (3- to 30-membered)heteroaryl(s); a tri(C1-C30)alkylsilyl; a tri(C6-C30)arylsilyl; a di(C1-C30)alkyl(C6-C30)arylsilyl; a (C1-C30)alkyldi(C6-C30)arylsilyl; an amino; a mono- or di-(C1-C30)alkylamino; a mono- or di-(C6-C30)arylamino unsubstituted or substituted with a (C1-C30)alkyl(s); a (C1-C30)alkyl(C6-C30)arylamino; a (C1-C30)alkylcarbonyl; a (C1-C30)alkoxycarbonyl; a (C6-C30)arylcarbonyl; a di(C6-C30)arylboronyl; a di(C1-C30)alkylboronyl; a (C1-C30)alkyl(C6-C30)arylboronyl; a (C6-C30)aryl(C1-C30)alkyl; and a (C1-C30)alkyl(C6-C30)aryl.
3 . The plurality of host materials according to claim 1 , wherein the compound represented by formula 1 is represented by at least one of the following formulas 1-1 and 1-2:
wherein, X 1 , Y 1 , Ar, L 1 , R 1 to R 4 , and a to d are as defined in claim 1 .
4 . The plurality of host materials according to claim 1 , wherein the compound represented by formula 2 is represented by at least one of the following formulas 2-1 to 2-7:
wherein,
HAr and L 2 are as defined in claim 1 ;
V and W, each independently, represent NR 16 , O or S;
R 16 represents a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
R 31 to R 45 , each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, —NR 6 R 7 , or —SiR 8 R 9 R 10 ;
R 8 to R 10 , each independently, represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl; and
g, k, l, m, o, q, s, t and u, each independently, represent an integer of 1 to 4; h, i, j, n and p, each independently, represent an integer of 1 to 6; r represents an integer of 1 or 2; where if g to u, each independently, are an integer of 2 or more, each of R 31 to each of R 45 may be the same or different.
5 . The plurality of host materials according to claim 1 , wherein Ar in formula 1 represents a substituted or unsubstituted phenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted biphenyl, a substituted or unsubstituted naphthylphenyl, a substituted or unsubstituted phenylnaphthyl, a substituted or unsubstituted terphenyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted benzophenanthrenyl, a substituted or unsubstituted fluoranthenyl, a substituted or unsubstituted fluorenyl, a substituted or unsubstituted benzofluorenyl, a substituted or unsubstituted triphenylenyl, a substituted or unsubstituted spirobifluorenyl, a substituted or unsubstituted spiro[cyclopentane-fluorene]yl, a substituted or unsubstituted spiro[indan-fluorene]yl, a substituted or unsubstituted spiro[fluorene-benzofluorene]yl, a substituted or unsubstituted nitrogen-containing 23-membered heteroaryl, a substituted or unsubstituted diphenylamino, a substituted or unsubstituted phenylbiphenylamino, a substituted or unsubstituted phenylnaphthylamino, a substituted or unsubstituted phenylterphenylamino, a substituted or unsubstituted phenylfluorenylamino, a substituted or unsubstituted naphthylbiphenylamino, a substituted or unsubstituted naphthylterphenylamino, a substituted or unsubstituted naphthylphenanthrenylamino, a substituted or unsubstituted dinaphthylamino, a substituted or unsubstituted dibiphenylamino, a substituted or unsubstituted biphenylfluorenylamino, a substituted or unsubstituted difluorenylamino, a substituted or unsubstituted biphenyldibenzofuranylamino, a substituted or unsubstituted biphenyidibenzothiophenylamino, or a substituted or unsubstituted phenylcarbazolyamino.
6 . The plurality of host materials according to claim 1 , wherein HAr in formula 2 represents a substituted or unsubstituted triazinyl, a substituted or unsubstituted pyridyl, a substituted or unsubstituted pyrimidinyl, a substituted or unsubstituted quinazolinyl, a substituted or unsubstituted benzoquinazolinyl, a substituted or unsubstituted quinoxalinyl, a substituted or unsubstituted benzoquinoxalinyl, a substituted or unsubstituted quinolyl, a substituted or unsubstituted benzoquinolyl, a substituted or unsubstituted isoquinolyl, a substituted or unsubstituted benzoisoquinolyl, a substituted or unsubstituted triazolyl, a substituted or unsubstituted pyrazolyl, a substituted or unsubstituted naphthyridinyl, or a substituted or unsubstituted benzothienopyrimidinyl.
7 . The plurality of host materials according to claim 1 , wherein the compound represented by formula 2 is represented by at least one of the following formulas 2-11 to 2-38:
wherein, HAr, each independently, represents any one selected from the group consisting of the following structures 4-1 to 4-28:
L 2 , each independently, represents a single bond, or any one selected from the group consisting of the following structures 3-1 to 3-40:
8 . The plurality of host materials according to claim 1 , wherein the compound represented by formula 1 is at least one selected from the group consisting of the following compounds:
9 . The plurality of host materials according to claim 7 , wherein the compound represented by formula 2 is at least one selected from the following compounds C2-1 to C2-259:
Compound
Formula
L 2
HAr
Compound
Formula
L 2
HAr
C2-1
2-11
3-3
4-1
C2-2
2-11
3-3
4-6
C2-3
2-11
3-3
4-9
C2-4
2-11
3-8
4-6
C2-5
2-11
3-3
4-11
C2-6
2-11
3-8
4-11
C2-7
2-12
3-3
4-1
C2-8
2-12
3-8
4-1
C2-9
2-12
3-3
4-11
C2-10
2-12
3-8
4-11
C2-11
2-12
3-16
4-1
C2-12
2-12
3-27
4-1
C2-13
2-12
3-3
4-6
C2-14
2-12
3-8
4-6
C2-15
2-12
3-16
4-6
C2-16
2-12
3-27
4-6
C2-17
2-12
3-3
4-9
C2-18
2-12
3-8
4-9
C2-19
2-12
3-16
4-9
C2-20
2-12
3-27
4-9
C2-21
2-13
3-3
4-1
C2-22
2-13
3-3
4-6
C2-23
2-13
3-3
4-9
C2-24
2-13
3-8
4-6
C2-25
2-13
3-3
4-11
C2-26
2-13
3-8
4-11
C2-27
2-14
3-3
4-1
C2-28
2-14
3-3
4-6
C2-29
2-14
3-3
4-9
C2-30
2-14
3-8
4-6
C2-31
2-14
3-3
4-11
C2-32
2-14
3-8
4-11
C2-33
2-15
3-3
4-1
C2-34
2-15
3-3
4-6
C2-35
2-15
3-3
4-9
C2-36
2-15
3-8
4-6
C2-37
2-15
3-3
4-11
C2-38
2-15
3-8
4-11
C2-39
2-16
3-3
4-1
C2-40
2-16
3-8
4-1
C2-41
2-16
3-16
4-1
C2-42
2-16
3-27
4-1
C2-43
2-16
3-3
4-6
C2-44
2-16
3-8
4-6
C2-45
2-16
3-3
4-11
C2-46
2-16
3-8
4-11
C2-47
2-16
3-16
4-6
C2-48
2-16
3-27
4-6
C2-49
2-16
3-3
4-9
C2-50
2-16
3-8
4-9
C2-51
2-16
3-16
4-9
C2-52
2-16
3-27
4-9
C2-53
2-17
3-3
4-1
C2-54
2-17
3-3
4-6
C2-55
2-17
3-3
4-9
C2-56
2-17
3-8
4-6
C2-57
2-17
3-3
4-11
C2-58
2-17
3-8
4-11
C2-59
2-18
3-3
4-1
C2-60
2-18
3-3
4-6
C2-61
2-18
3-3
4-9
C2-62
2-18
3-8
4-6
C2-63
2-18
3-3
4-11
C2-64
2-18
3-8
4-11
C2-65
2-19
3-3
4-1
C2-66
2-19
3-3
4-6
C2-67
2-19
3-3
4-9
C2-68
2-19
3-8
4-6
C2-69
2-19
3-3
4-11
C2-70
2-19
3-8
4-11
C2-71
2-20
3-3
4-1
C2-72
2-20
3-3
4-6
C2-73
2-20
3-3
4-9
C2-74
2-20
3-8
4-6
C2-75
2-20
3-3
4-11
C2-76
2-20
3-8
4-11
C2-77
2-21
3-3
4-1
C2-78
2-21
3-3
4-6
C2-79
2-21
3-3
4-9
C2-80
2-21
3-8
4-6
C2-81
2-21
3-3
4-11
C2-82
2-21
3-8
4-11
C2-83
2-22
3-3
4-1
C2-84
2-22
3-3
4-6
C2-85
2-22
3-3
4-9
C2-86
2-22
3-8
4-6
C2-87
2-22
3-3
4-11
C2-88
2-22
3-8
4-11
C2-89
2-23
3-3
4-1
C2-90
2-23
3-8
4-1
C2-91
2-23
3-16
4-1
C2-92
2-23
3-27
4-1
C2-93
2-23
3-3
4-11
C2-94
2-23
3-8
4-11
C2-95
2-23
3-3
4-6
C2-96
2-23
3-8
4-6
C2-97
2-23
3-16
4-6
C2-98
2-23
3-27
4-6
C2-99
2-23
3-3
4-9
C2-100
2-23
3-8
4-9
C2-101
2-23
3-16
4-9
C2-102
2-23
3-27
4-9
C2-103
2-24
3-3
4-1
C2-104
2-24
3-3
4-6
C2-105
2-24
3-3
4-9
C2-106
2-24
3-8
4-6
C2-107
2-24
3-3
4-11
C2-108
2-24
3-8
4-11
C2-109
2-25
3-3
4-1
C2-110
2-25
3-3
4-6
C2-111
2-25
3-3
4-9
C2-112
2-25
3-8
4-6
C2-113
2-25
3-3
4-11
C2-114
2-25
3-8
4-11
C2-115
2-26
3-3
4-1
C2-116
2-26
3-3
4-6
C2-117
2-26
3-3
4-9
C2-118
2-26
3-8
4-6
C2-119
2-26
3-3
4-11
C2-120
2-26
3-8
4-11
C2-121
2-27
3-3
4-1
C2-122
2-27
3-3
4-6
C2-123
2-27
3-3
4-9
C2-124
2-27
3-8
4-6
C2-125
2-27
3-3
4-11
C2-126
2-27
3-8
4-11
C2-127
2-28
3-3
4-1
C2-128
2-28
3-3
4-6
C2-129
2-28
3-3
4-9
C2-130
2-28
3-8
4-6
C2-131
2-28
3-3
4-11
C2-132
2-28
3-8
4-11
C2-133
2-29
3-3
4-1
C2-134
2-29
3-3
4-6
C2-135
2-29
3-3
4-9
C2-136
2-29
3-8
4-6
C2-137
2-29
3-3
4-11
C2-138
2-29
3-8
4-11
C2-139
2-30
3-3
4-1
C2-140
2-30
3-8
4-1
C2-141
2-30
3-16
4-1
C2-142
2-30
3-27
4-1
C2-143
2-30
3-3
4-11
C2-144
2-30
3-8
4-11
C2-145
2-30
3-3
4-6
C2-146
2-30
3-8
4-6
C2-147
2-30
3-16
4-6
C2-148
2-30
3-27
4-6
C2-149
2-30
3-3
4-9
C2-150
2-30
3-8
4-9
C2-151
2-30
3-16
4-9
C2-152
2-30
3-27
4-9
C2-153
2-31
3-3
4-1
C2-154
2-31
3-3
4-6
C2-155
2-31
3-3
4-9
C2-156
2-31
3-8
4-6
C2-157
2-31
3-3
4-11
C2-158
2-31
3-8
4-11
C2-159
2-32
3-3
4-1
C2-160
2-32
3-3
4-6
C2-161
2-32
3-3
4-9
C2-162
2-32
3-8
4-6
C2-163
2-32
3-3
4-11
C2-164
2-32
3-8
4-11
C2-165
2-33
3-3
4-1
C2-166
2-33
3-3
4-6
C2-167
2-33
3-3
4-9
C2-168
2-33
3-8
4-6
C2-169
2-33
3-3
4-11
C2-170
2-33
3-8
4-11
C2-171
2-34
3-3
4-1
C2-172
2-34
3-3
4-6
C2-173
2-34
3-3
4-9
C2-174
2-34
3-8
4-6
C2-175
2-34
3-3
4-11
C2-176
2-34
3-8
4-11
C2-177
2-35
3-3
4-1
C2-178
2-35
3-3
4-6
C2-179
2-35
3-3
4-9
C2-180
2-35
3-8
4-6
C2-181
2-35
3-3
4-11
C2-182
2-35
3-8
4-11
C2-183
2-36
3-3
4-1
C2-184
2-36
3-3
4-6
C2-185
2-36
3-3
4-9
C2-186
2-36
3-8
4-6
C2-187
2-36
3-3
4-11
C2-188
2-36
3-8
4-11
C2-189
2-37
3-3
4-1
C2-190
2-37
3-3
4-6
C2-191
2-37
3-3
4-9
C2-192
2-37
3-8
4-6
C2-193
2-37
3-3
4-11
C2-194
2-37
3-8
4-11
C2-195
2-38
3-3
4-1
C2-196
2-38
3-3
4-6
C2-197
2-38
3-3
4-9
C2-198
2-38
3-8
4-6
C2-199
2-38
3-3
4-11
C2-200
2-38
3-8
4-11
C2-201
2-12
Single
4-9
C2-202
2-16
Single
4-9
Bond
Bond
C2-203
2-23
Single
4-9
C2-204
2-26
Single
4-9
Bond
Bond
C2-205
2-30
Single
4-9
C2-206
2-37
Single
4-9
Bond
Bond
C2-207
2-11
Single
4-5
C2-208
2-12
Single
4-6
Bond
Bond
C2-209
2-16
Single
4-8
C2-210
2-23
Single
4-1
Bond
Bond
C2-211
2-30
Single
4-1
C2-212
2-37
Single
4-1
Bond
Bond
C2-213
2-12
3-8
4-20
C2-214
2-12
3-8
4-21
C2-215
2-12
3-8
4-22
C2-216
2-12
3-8
4-23
C2-217
2-12
3-8
4-24
C2-218
2-12
3-8
4-25
C2-219
2-12
3-8
4-26
C2-220
2-12
3-8
4-27
C2-221
2-12
3-8
4-28
C2-222
2-12
3-1
4-1
C2-223
2-12
3-2
4-1
C2-224
2-12
3-4
4-1
C2-225
2-12
3-5
4-1
C2-226
2-12
3-6
4-1
C2-227
2-12
3-7
4-1
C2-228
2-12
3-9
4-1
C2-229
2-12
3-10
4-1
C2-230
2-12
3-11
4-1
C2-231
2-12
3-12
4-1
C2-232
2-12
3-13
4-1
C2-233
2-12
3-14
4-1
C2-234
2-12
3-15
4-1
C2-235
2-12
3-40
4-1
C2-236
2-12
3-17
4-1
C2-237
2-12
3-18
4-1
C2-238
2-12
3-19
4-1
C2-239
2-12
3-20
4-1
C2-240
2-12
3-21
4-1
C2-241
2-12
3-22
4-1
C2-242
2-12
3-23
4-1
C2-243
2-12
3-24
4-1
C2-244
2-12
3-25
4-1
C2-245
2-12
3-26
4-1
C2-246
2-12
3-29
4-1
C2-247
2-12
3-28
4-1
C2-248
2-12
3-31
4-1
C2-249
2-12
3-30
4-1
C2-250
2-12
3-33
4-1
C2-251
2-12
3-32
4-1
C2-252
2-12
3-35
4-1
C2-253
2-12
3-34
4-1
C2-254
2-12
3-37
4-1
C2-255
2-12
3-36
4-1
C2-256
2-12
3-39
4-1
C2-257
2-12
3-38
4-1
C2-258
2-12
3-9
4-11
C2-259
2-12
3-8
4-5
wherein, the compounds C2-1 to C2-259, each independently, are represented by any one of formulas 2-11 to 2-38, L 2 represents a single bond, or any one of the structures 3-1 to 3-40, and HAr represents any one of the structures 4-1 to 4-28.
10 . An organic electroluminescent device comprising an anode, a cathode, and at least one light-emitting layer between the anode and the cathode, wherein the at least one layer of the light-emitting layers comprises the plurality of host materials according to claim 1 .