▎ 摘　　要

The purpose of this study was to fabricate Platinum-free counter electrode (CE) materials for energy conversion devices. Initially, pyrrole was polymerized overnight in deionized water followed by 72 h of drying at 60 C to obtain powdered PPY. Similarly, in-situ polymerization of pyrrole yielded PPY/graphene nanocomposite with variable graphene concentrations (2-8 wt%). Powdered samples were characterized by SEM, XRD, and FTIR for compositional and morphological analysis. CEs of dye-sensitized solar cells (DSSCs) were made with PPY and PPY/graphene composites. The dye-sensitized TiO2 photoanodes were connected to CEs to carry out current-voltage measurements using Keithley Solar Simulator. The DSSCs with PPY/4 % graphene CE showed the highest efficiency (3.06%).