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

Claim 4:
5. The organic electroluminescence device according to claim 1, wherein the electron-withdrawing group is selected from a group consisting of: halogen, a nitroso group, a nitro group, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, SCN, OCN, SF5, a boryl group, a sulfinyl group, a sulfonyl group, a phosphoroso group, an aza-aromatic ring group, and any one of the following groups substituted by one or more of halogen, a nitroso group, a nitro group, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, SCN, OCN, SF5, a boryl group, a sulfinyl group, a sulfonyl group, a phosphoroso group, and an aza-aromatic ring group: an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 ring carbon atoms, a heteroalkyl group having 1 to 20 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an aryloxy group having 6 to 30 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, a heteroaryl group having 3 to 30 carbon atoms, an alkylsilyl group having 3 to 20 carbon atoms, an arylsilyl group having 6 to 20 carbon atoms, and combinations thereof;
optionally, the electron-withdrawing group is selected from a group consisting of: F, CF3, OCF3, SF5, SO2CF3, a cyano group, an isocyano group, SCN, OCN, a pyrimidinyl group, a triazinyl group, and combinations thereof.