▎ 摘　　要

With an aim of accelerating charge transport and increasing interface area for triiodide electroreduction reaction, positively charged polyaniline single wall carbon nanotube PANi-SWCNT complex, chemically polymerized from aniline-single wall carbon nanotube complex, is combined with negatively charged graphene oxide (GO) by a layer-by-layer self-assembly technique. Covalent bond between PANi and SWCNT dramatically diminish the charges-transfer resistance within the complex, which is confirmed by electrical and electrochemical characterizations. The multilayer architecture of resultant (PANi-SWCNT/GO)(n) (n represents bilayer number) counter electrode provides enormous interface for triiodide electrocatalysis. An impressive power conversion efficiency of 6.88% is recorded from the DSSC with (PANi-4 wt% SWCNT/GO)(5) multilayer counter electrode. These results are far from optimal but the preliminary photovoltaic performances make the strategy promising in efficient DSSC applications. (C) 2014 Elsevier Ltd. All rights reserved.