Azulene ring-containing compound, its use, and an organic photoelectric device including the same

1. An azulene ring-containing compound, wherein the azulene ring-containing compound is a compound represented by the structure of Formula I:

in Formula I, Z ring

is an unsaturated five-membered ring or an unsaturated six-membered ring, and D is an electron-donating group.

2. The azulene ring-containing compound according to claim 1 , wherein the Z ring in Formula I is a benzene ring, a thiophene ring, a furan ring, or a pyridine ring.

3. The azulene ring-containing compound according to claim 1 , wherein the azulene ring-containing compound is a compound represented by the structure of Formula II:

4. The azulene ring-containing compound according to claim 1 , wherein the azulene ring-containing compound is a compound represented by the structure of Formula III:

5. The azulene ring-containing compound according to claim 1 , wherein the azulene ring-containing compound is a compound represented by the structure of Formula IV:

6. The azulene ring-containing compound according to claim 1 , wherein the azulene ring-containing compound is a compound represented by the structure of Formula V:

7. The azulene ring-containing compound according to claim 1 , wherein D is an electron-donating group containing nitrogen.

8. The azulene ring-containing compound according to claim 7 , wherein D is selected from any one of the following groups:

wherein, X and Y each is independently selected from one of a carbon atom, a nitrogen atom, an oxygen atom, a sulfur atom, and a silicon atom;

R 1 and R 2 each is independently selected from any one of a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted phenyl group, a substituted or unsubstituted carbazolyl, a substituted or unsubstituted diphenylamino, r and s each is independently 0, 1, 2 or 3;

R 3 and R 4 each is independently selected from any one of a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted phenyl group, a substituted or unsubstituted carbazolyl, a substituted or unsubstituted diphenylamino, p and q each is independently 0, 1, or 2;

# represents a linking site of a group.

9. The azulene ring-containing compound according to claim 8 , wherein the substituted or unsubstituted phenyl group has a structural formula of

the substituted or unsubstituted carbazolyl group has a structural formula of

and the substituted or unsubstituted diphenylamino group has a structural formula of

wherein, R 5 , R 6 , R 7 and R 8 each is independently selected from any one of an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, and a phenyl group;

u and v each is independently 0, 1, 2 or 3;

## represents a linking site of a group.

10. The azulene ring-containing compound according to claim 1 , wherein D is selected from any one of the following groups:

wherein, # represents a linking site of a group.

11. The azulene ring-containing compound according to claim 3 , wherein the azulene ring-containing compound is a compound represented by any one of the following structures;

12. The azulene ring-containing compound according to claim 4 , wherein the azulene ring-containing compound is a compound represented by any one of the following structures:

13. The azulene ring-containing compound according to claim 5 , wherein the azulene ring-containing compound is a compound represented by any one of the following structures:

14. The azulene ring-containing compound according to claim 6 , wherein the azulene ring-containing compound is a compound represented by any one of the following structures:

15. The azulene ring-containing compound according to claim 1 , wherein the azulene ring-containing compound has an energy level difference ΔE st =E S1 −E T1 ≤0.3 eV between the lowest singlet state energy level S 1 and the lowest triplet state energy level T 1 .

16. An organic photoelectric device, wherein the organic photoelectric device includes an anode, a cathode, and one or more organic thin film layers located between the anode and the cathode;

and at least one of the organic thin film layers contains the azulene ring-containing compound according to claim 1 .

17. The organic optoelectronic device according to claim 16 , wherein the organic thin film layer includes at least one light-emitting layer; and

the light-emitting layer includes a host material and a guest material, and the host material or the guest material of the light-emitting layer includes the azulene ring-containing compound according to claim 1 .

18. The organic optoelectronic device according to claim 17 , wherein the organic thin film layer further comprises one or a combination of at least two of a hole injection layer, a hole transport layer, an electron blocking layer, a hole blocking layer, an electron transport layer, and an electron injection layer.

19. The organic optoelectronic device according to claim 17 , wherein the organic optoelectronic 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 laminated; and

the guest material of the light-emitting layer is selected from one or a combination of at least two of the azulene ring-containing compound according to claim 1 .