Compound, display panel, and display device
The present disclosure belongs to technical field of OLEDs, and provides a compound suitable as a hole transport material and an electron blocking material of OLEDs. The compound has a general structure according to [Chemical Formula 1], in which Ar 1 and Ar 2 are each independently selected from a hydrogen atom, a substituted or unsubstituted C5-C40 aryl, or a substituted or unsubstituted C5-C40 heteroaryl; m and n are each an integer independently selected from 0, 1, or 2; X is selected from O, S, or —NR—; R is selected from hydrogen, or a substituted or unsubstituted C5-C40 aryl; Ar 3 has a structure according to [Chemical Formula 2], in which R 1 -R 8 are each independently selected from a hydrogen atom, or a substituted or unsubstituted C5-C40 aryl; Y is selected from O, S, or —NR′—; and R′ is selected from a hydrogen atom, or a substituted or unsubstituted C5-C40 aryl.
1. A compound having a general structure according to Chemical Formula 1:
wherein Ar 1 and Ar 2 are each independently selected from the group consisting of a hydrogen atom and a substituted or unsubstituted C5-C40 heteroaryl;
m and n are each an integer independently selected from 0, 1, or 2, and m and n are not both 1;
X is —NH—;
Ar 3 has a structure according to Chemical Formula 2:
seven R7 seven of R 1 -R 8 are each independently selected from the group consisting of a hydrogen atom and a substituted or unsubstituted C5-C40 aryl, and the remaining one of R 1 -R 8 is a bonding position with Chemical Formula 1; and
Y is —NH—.
2. The compound according to claim 1 , wherein Ar 1 and Ar 2 are each a hydrogen atom.
3. The compound according to claim 1 , wherein m and n are each an integer independently selected from 0 or 1, and m and n are not both 1.
4. The compound according to claim 1 , wherein seven of R 1 -R 8 are each a hydrogen atom and the remaining one of R 1 -R 8 is a bonding position with Chemical Formula 1.
5. The compound according to claim 1 , wherein the compound has a molecular weight smaller than or equal to 1000.
6. The compound according to claim 1 , wherein the compound has a triplet energy level E T greater than or equal to 2.6 eV.
7. The compound according to claim 1 , wherein the compound has a glass transition temperature T g greater than or equal to 120° C.
8. A display panel comprising an organic light-emitting element,
wherein the organic light-emitting element comprises an anode, a cathode arranged opposite to the anode, a hole transport layer, and a light-emitting layer,
wherein the hole transport layer and the light-emitting layer are disposed between the anode and the cathode, and
wherein a material of the hole transport layer comprises one or more compounds according to claim 1 .
9. The display panel according to claim 8 , further comprising an electron blocking layer disposed between the anode and the cathode,
wherein the electron blocking layer comprises one or more compounds according to claim 1 .
10. A display device comprising the display panel according to claim 8 .