Compound and organic electro-optical device containing the same
Provided are a compound and an organic electro-optical device containing the same. The compound has a structure represented by Formula I. The organic electro-optical device comprises an anode, a cathode, and at least one organic thin film layer located between the cathode and the anode. The molecule of the compound provided by the present disclosure has higher rigidity, a large conjugated system, a deeper LUMO energy level, a higher triplet energy level and good molecular stability, and is not easy to crystallize, and thus the compound can be used as an electron transport material or a hole blocking material of the organic electro-optical device, facilitating the reduction of the turn-on voltage of the device, the improvement of current efficiency and the increase of service life.
1. A compound having a structure represented by Formula II:
wherein A is any one selected from the group consisting of a cyano-containing electron acceptor group, a nitrogen heterocycle-containing electron acceptor group, a sulfone-containing electron acceptor group, a carbonyl-containing electron acceptor group, a phosphinyloxy-containing electron acceptor group and a boron-containing electron acceptor group.
2. The compound according to claim 1 , wherein the cyano-containing electron acceptor group is any one selected from the group consisting of the following groups:
wherein R is any one selected from the group consisting of a hydrogen atom, C 1 -C 20 alkyl, C 1 -C 20 alkoxy, C 6 -C 30 aryl and C 2 -C 30 heteroaryl, and #represents a linkage position of groups.
3. The compound according to claim 1 , wherein the nitrogen heterocycle-containing electron acceptor group is any one selected from the group consisting of the following groups:
wherein R 1 is any one selected from the group consisting of C 1 -C 20 alkyl, C 1 -C 20 alkoxy, C 6 -C 30 aryl and C 2 -C 30 heteroaryl, and #represents a linkage position of groups.
4. The compound according to claim 1 , wherein the sulfone-containing electron acceptor group is any one selected from the group consisting of the following groups:
wherein #represents a linkage position of groups.
5. The compound according to claim 1 , wherein the carbonyl-containing electron acceptor group is any one selected from the group consisting of the following groups:
wherein R 2 is any one selected from the group consisting of C 1 -C 20 alkyl, C 1 -C 20 alkoxy, C 6 -C 30 aryl and C 2 -C 30 heteroaryl, and #represents a linkage position of groups.
6. The compound according to claim 1 , wherein the phosphinyloxy-containing electron acceptor group is any one selected from the group consisting of the following groups:
wherein X is O, S,
R 3 to R 12 are each independently any one selected from the group consisting of a hydrogen atom, C 1 -C 20 alkyl, C 1 -C 20 alkoxy, C 6 -C 30 aryl and C 2 -C 30 heteroaryl, Ria is any one selected from the group consisting of C 6 -C 30 aryl and C 2 -C 30 heteroaryl, and #represents a linkage position of groups.
7. The compound according to claim 1 , wherein the boron-containing electron acceptor group is any one selected from the group consisting of the following groups:
wherein Y is O, S,
R 14 to R 22 are each independently any one selected from the group consisting of a hydrogen atom, C 1 -C 20 alkyl, C 1 -C 20 alkoxy, C 6 -C 30 aryl and C 2 -C 30 heteroaryl, and #represents a linkage position of groups.
8. A compound selected from the group consisting of the following compounds P1 to P97:
9. An organic electro-optical device comprising an anode, a cathode and at least one organic thin film layer located between the anode and the cathode;
wherein the at least one organic thin film layer is one selected from the group consisting of a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transport layer, an electron injection layer, and a combination of at least two selected therefrom, and comprises a light emitting layer;
at least one of the organic thin film layers comprises at least one of the compounds having a structure represented by Formula II:
wherein A is any one selected from the group consisting of a cyano-containing electron acceptor group, a nitrogen heterocycle-containing electron acceptor group, a sulfone-containing electron acceptor group, a carbonyl-containing electron acceptor group, a phosphinyloxy-containing electron acceptor group and a boron-containing electron acceptor group.
10. The organic electro-optical device according to claim 9 , wherein the organic electro-optical device comprises an anode, a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transport layer, an electron injection layer and a cathode which are sequentially stacked.
11. The organic electro-optical device according to claim 9 , wherein a material of the electron transport layer comprises one or more said compounds in Formular (II).
12. The organic electro-optical device according to claim 9 , wherein the electron transport layer comprises a host material and a guest material, and the host material of the electron transport layer is one or more said compounds in Formular (II).
13. The organic electro-optical device according to claim 9 , wherein a material of the hole blocking layer is one or more said compounds in Formular (II), and the lowest triplet energy level of a light emitting material of the light emitting layer is lower than the lowest triplet energy level of the compound.