Patent ID: 11950507
Assignee: BEIJING SUMMER SPROUT TECHNOLOGY CO., LTD.
Field: nan (nan)
Classification: CPC H  Y | IPC H

Claim 13:
14. The organic electroluminescence device according to claim 1, wherein Ar1 and Ar2 are selected from a substituted or unsubstituted aryl group having 6 to 20 carbon atoms or a substituted or unsubstituted heteroaryl group having 3 to 20 carbon atoms; optionally, Ar1 and Ar2 are selected from a phenyl group, a biphenylyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a dibenzothienyl group, a spirobifluorenyl group, a pyridyl group, or a pyrimidinyl group.