▎ 摘　　要

NOVELTY - A graphene composite layer has a graphene layer and a coating layer containing amine-based compound (I) formed on surface(s) of the graphene layer. USE - Graphene composite layer is used for electrode for electronic device e.g. organic light emitting device, organic solar cell, organic semiconductor device and organic optoelectronic devices (all claimed). ADVANTAGE - The graphene composite layer has low work function. DETAILED DESCRIPTION - A graphene composite layer has a graphene layer and a coating layer containing amine-based compound of formula (I) formed on surface(s) of the graphene layer. L=1-10C alkylene; R1-R4=H, 1-30C alkyl, 1-30C alkenyl, 1-30C alkoxy, 1-30C acyl, 6-30C aryl, 2-30C heteroaryl, 3-30C heterocyclyl, halo, or group chosen from groups of formulae (i)-(v); X=C-(R11) or N; Y'=C-(R12)2, N-Lc-Ar3, O or S; R5-R12=H, 1-10C alkyl, 6-20C aryl or 2-20C heteroaryl; La-Lc=1-10C alkylene or 6-20C arylene; Ar1-Ar3=H, 1-20C alkyl, 6-20C aryl, 2-20C heteroaryl or amino;and (one of R1-R12)+L=optionally substituted ring containing substituents chosen from 1-20C alkyl, 1-20C alkoxy, 6-30C aryl, 2-30C heteroaryl, 3-30C heterocyclyl, 1-30C acyl, 6-30C acyloxy, 2-30C dialkylamino, 12-30C diarylamino, 7-30C alkylarylamino, 2-30 dialkylamino, 12-30C diarylphosphino, 7-30C alkylarylphosphino, amino, halo, cyano, hydroxy and carboxy.