COMPOUND, DISPLAY PANEL AND DISPLAY APPARATUS
The present disclosure relates to the field of OLED technologies, and provides a light-emitting host material including an adamantane structure, and having a structure represented by Formula (I). L 1 and L 2 are each independently selected from a single bond, phenyl, naphthyl or the like. The electron donor D is selected from carbazolyl and its derivative groups, diphenylamino and its derivative groups, or acridinyl and its derivative groups. The electron acceptor A is mainly selected from a nitrogen-containing heterocyclic substituent, a cyano-containing substituent, a triarylboron-based substituent. The D-(π)-σ-(π)-A structure in the compound has a bipolar property, and the intermediate σ bond can effectively interrupt the intramolecular charge transmission between the electron donor D and the electron acceptor A. The compound is used as a host material of the light-emitting layer in an OLED to reduce the efficiency roll-off of the blue light material, and enhance luminance and efficiency.
1 . A compound having a chemical structure according to Formula (I):
wherein
D is an electron donor;
A is an electron acceptor;
m is a number of D,
n is a number of A;
m and n are each an integer independently selected from 1, 2 or 3;
p is a number of L 1 ;
q is a number of L 2 ;
p and q are each an integer independently selected from 0, 1 or 2;
L 1 and L 2 are each independently selected from the group consisting of a single bond, a substituted or unsubstituted C1-C20 alkylene, a substituted or unsubstituted C3-C20 cycloalkylene, a substituted or unsubstituted C3-C20 heterocyclic alkylene, a substituted or unsubstituted C6-C40 arylene, a substituted or unsubstituted C4-C40 heteroarylene, a substituted or unsubstituted C10-C60 fused arylene, a substituted or unsubstituted C10-C60 fused heteroarylene, and combinations thereof;
D is selected from the group consisting of a substituted or unsubstituted C1-C20 alkyl, a substituted or unsubstituted C3-C20 cycloalkyl, a substituted or unsubstituted C1-C20 alkoxy, a substituted or unsubstituted C3-C20 heterocyclic group, a substituted or unsubstituted C6-C40 aryl, a substituted or unsubstituted C4-C40 heteroaryl, a substituted or unsubstituted C10-C60 fused aryl, a substituted or unsubstituted C10-C60 fused heteroaryl, a substituted or unsubstituted C12-C40 carbazolyl and its derivative groups, a substituted or unsubstituted C12-C40 diphenylamino and its derivative groups, a substituted or unsubstituted C18-C60 triphenylamino and its derivative groups, a substituted or unsubstituted C13-C40 acridinyl and its derivative groups, and combinations thereof; and
A is selected from the group consisting of a nitrogen-containing heterocyclic group, a cyano-containing group, a triarylboron-based group, a benzophenone-based group, a heteroaromatic ketone-based group, a sulfone-based group, a phosphoroso-containing groups, and combinations thereof.
2 . The compound according to claim 1 , wherein the compound has any one of the following chemical structures:
wherein L 3 and L 4 are each independently selected from the group consisting of a single bond, a substituted or unsubstituted C1-C20 alkylene, a substituted or unsubstituted C3-C20 cycloalkylene, a substituted or unsubstituted C3-C20 heterocyclic alkylene, a substituted or unsubstituted C6-C40 arylene, a substituted or unsubstituted C4-C40 heteroarylene, a substituted or unsubstituted C10-C60 fused arylene, a substituted or unsubstituted C10-C60 fused heteroarylene, and combinations thereof.
3 . The compound according to claim 1 , wherein D is according to any one of the following formulas:
wherein m, n and p are each an integer independently selected from 0, 1, 2 or 3;
U 1 , U 2 , U 3 are each independently selected from the group consisting of a hydrogen atom, a substituted or unsubstituted C1-C30 alkyl, a substituted or unsubstituted silylene, a substituted or unsubstituted C3-C20 cycloalkyl, a substituted or unsubstituted C1-C30 alkoxy, a substituted or unsubstituted C6-C30 aryl, a substituted or unsubstituted C10-C30 fused aryl, and combinations thereof; and
# indicates a bonding position.
4 . The compound according to claim 3 , wherein D is according to any one of the following formulas:
wherein R is selected from the group consisting of a hydrogen atom, a substituted or unsubstituted C1-C20 alkyl, a substituted or unsubstituted silylene group, a substituted or unsubstituted C3-C20 cycloalkyl, a substituted or unsubstituted C1-C20 alkoxy, a substituted or unsubstituted C3-C20 heterocyclic group, a substituted or unsubstituted C6-C40 aryl, a substituted or unsubstituted C10-C30 fused aryl, and a substituted or unsubstituted C4-C40 heteroaryl.
5 . The compound according to claim 1 , wherein D is according to any one of the following formulas:
wherein
Z is selected from the group consisting of a carbon atom, a nitrogen atom, an oxygen atom, a sulfur atom, and a silicon atom;
m, n and q are each an integer independently selected from 0, 1, 2 or 3;
U 1 , U 2 , U 3 and U 4 are each independently selected from the group consisting of a hydrogen atom, a substituted or unsubstituted C1-C30 alkyl, a substituted or unsubstituted silylene, a substituted or unsubstituted C3-C20 cycloalkyl, a substituted or unsubstituted C1-C30 alkoxy, a substituted or unsubstituted C6-C30 aryl, a substituted or unsubstituted C10-C30 fused aryl, and combinations thereof;
when Z is an oxygen atom or a sulfur atom, q is 0; and
# indicates a bonding position.
6 . The compound according to claim 5 , wherein D is according to any one of the following formulas:
# indicates a bonding position.
7 . The compound according to claim 1 , wherein D is according to any one of the following formulas:
wherein
Z is selected from the group consisting of a carbon atom, a nitrogen atom, an oxygen atom, a sulfur atom and a silicon atom;
X is selected from the group consisting of a carbon atom, a nitrogen atom, an oxygen atom and a sulfur atom;
m, n, p and q are each an integer independently selected from 0, 1, 2 or 3;
U 1 , U 2 , U 3 and U 4 are each independently selected from the group consisting of a hydrogen atom, a substituted or unsubstituted C1-C30 alkyl, a substituted or unsubstituted silylene, a substituted or unsubstituted C3-C20 cycloalkyl, a substituted or unsubstituted C1-C30 alkoxy, a substituted or unsubstituted C6-C30 aryl, and a substituted or unsubstituted C10-C30 fused aryl, and combinations thereof;
when Z is an oxygen atom or a sulfur atom, p is 0;
when X is an oxygen atom or a sulfur atom, q is 0; and
# indicates a bonding position.
8 . The compound according to claim 7 , wherein D is according to any one of the following formulas:
wherein R 1 , R 2 , R 3 and R 4 are each independently selected from the group consisting of a hydrogen atom, a substituted or unsubstituted C1-C20 alkyl, a substituted or unsubstituted C3-C20 cycloalkyl, a substituted or unsubstituted C1-C20 alkoxy, a substituted or unsubstituted C3-C20 heterocyclic group, a substituted or unsubstituted C6-C40 aryl, and a substituted or unsubstituted C4-C40 heteroaryl.
9 . The compound according to claim 1 , wherein A is according to any one of the following formulas:
wherein
R is selected from the group consisting of a hydrogen atom, a C1-C20 alkyl, a C1-C20 alkoxy, a C4-C8 cycloalkyl, a C6-C40 aryl, and a C4-C40 heteroaryl; and
# indicates a bonding position.
10 . The compound according to claim 1 , wherein A is according to any one of the following formulas:
wherein # indicates a bonding position.
11 . The compound according to claim 1 , wherein A is according to any one of the following formulas:
wherein # indicates a bonding position.
12 . The compound according to claim 1 , wherein A is according to any one of the following formulas:
wherein # indicates a bonding position.
13 . The compound according to claim 1 , wherein L 1 and L 2 are each independently selected from any one of the following formulas:
wherein
Z 1 and Z 2 are each independently selected from the group consisting of a hydrogen atom, a substituted or unsubstituted C6-C30 aryl, a substituted or unsubstituted C6-C30 fused aryl, and a substituted or unsubstituted C6-C30 fused heteroaryl;
p and q are each an integer greater than or equal to 0; and
# indicates a bonding position.
14 . The compound according to claim 13 , wherein L 1 and L 2 are each independently selected from any one of the following formulas:
wherein # indicates a bonding position.
15 . The compound according to claim 1 , wherein the compound is selected from the group consisting of the following compounds:
16 . A display panel, comprising an organic light-emitting device, wherein the organic light-emitting device comprises an anode, a cathode arranged opposite to the anode, and a light-emitting layer disposed between the anode and the cathode, the light-emitting layer comprising a host material and a guest material, wherein the host material of the light-emitting layer comprises one or more of compounds according to claim 1 .
17 . The display panel according to claim 16 , wherein the light-emitting layer is a blue light-emitting layer, and the host material is a host material of the blue light-emitting layer.
18 . The display panel according to claim 16 , wherein the host material has a higher singlet energy level S1 than the guest material, and a difference between the singlet energy level S1 of the host material and the singlet energy level S1 of the guest material is less than 0.8 eV; and
the host material has a higher triplet energy level T1 than the guest material, and a difference between the triplet energy level T1 of the host material and the triplet energy level T1 of the guest material is less than 0.4 eV.
19 . The display panel according to claim 16 , wherein the organic light-emitting device further comprises one or more layers selected from the group consisting of a hole injection layer, a hole transmission layer, an electron blocking layer, a hole blocking layer, an electron transmission layer, and an electron injection layer.
20 . A display apparatus, comprising the display panel according to claim 16 .