▎ 摘　　要

With an aim of accelerating the charge transfer between polyaniline (PAN and graphene, polyaniline graphene (PANi-graphene) complexes are synthesized by a reflux technique and employed as counter electrodes (CEs) for dye sensitized solar cells (DSSCs). Because of the easy charge-transfer between PANi (N atoms) and graphene (C atoms) by a covalent bond, electrical conduction and electrocatalysis of PANi-graphene complex CEs, and therefore power conversion efficiency of their DSSCs have been elevated in comparison with that of PANi only CE. The resultant PANi graphene complex CEs are characterized by spectral analysis, morphology observation, and electrochemical tests. The DSSC employing PANi-8 wt parts per thousand graphene complex CE gives an impressive power conversion efficiency of 7.78%, which is higher than 6.24% from PANi only and 6.52% from Pt only CE based DSSCs.