It is demonstrated that the dispersion of alpha-Al2O3 nanoparticles in graphene oxide (GO)-polyaniline (PANi) composite results in significant enhancement of photovoltaic and supercapacitive properties. In order to improve PV and SC properties of GO-PANi composite, 0.5 wt% of alpha-Al2O3 nanoparticles were added in composite. Both PV and SC properties of composites becomes strengthen by addition of 0.5 wt% of alpha-Al2O3 nanoparticles. The GO-PANi/alpha-Al2O3 composite shows power conversion efficiency (%eta) 9.31%, which is significantly higher than pure alpha-Al2O3 nanoparticles and GO-PANi composite. The GO-PANi/alpha-Al2O3 composite achieve considerable specific capacitance of the order 715.5 Fg(-1) at scan rate of 2mV s(-1). (C) 2018 Elsevier B.V. All rights reserved.