Low platinum loading PtNPs/graphene composite catalyst with high electrocatalytic activity for dye-sensitized solar cells  

作　　者：李萍剑 程凯 陈远富 王泽高 郝昕 刘竞博 贺加瑞 张万里 

机构地区：[1]State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China

出　　处：《Chinese Physics B》2012年第11期490-494,共5页中国物理B（英文版）

基　　金：Project supported by the Program for New Century Excellent Talents in University,China (Grant No. NCET-10-0291);the Fundamental Research Funds for the Central Universities,China (Grant Nos. ZYGX2009X005 and ZYGX2010J031);the Startup Research Project of University of Electronic Science and Technology of China (Grant No.Y02002010301041);the National Natural Science Foundation of China (Grant Nos. 50832007,11074285,and 51202022)

摘　　要：Platinum nanoparticles （PtNPs）/graphene composite materials are synthesized by a controlled chemical reduction of H2PtC16 on graphene sheets. The electrocatalytic activity of a PtNPs/graphene composite counter electrode for a dye-sensitized solar cell （DSSC） is investigated. The results demonstrate that the PtNPs/graphene composite has high electrocatalytic activity for the dye-sensitized solar cell. The cell employing PtNPs （1.6 wt%）/graphene counter electrode reaches an conversion efficiency （η） of 3.89% upon the excitation of 100 mW/cm2 AM 1.5 white light, which is comparable to that of the cell with a Pt-film counter electrode （7 = 3.76%）. It suggests that one can use only 14% Pt content of the conventional Pt-film counter electrode to obtain a comparable conversion efficiency. It may be possible to obtain a high performance DSSC using the PtNPs/graphene composite with a very low Pt content as a counter electrode due to its simplicity, low cost, and large scalability.Platinum nanoparticles （PtNPs）/graphene composite materials are synthesized by a controlled chemical reduction of H2PtC16 on graphene sheets. The electrocatalytic activity of a PtNPs/graphene composite counter electrode for a dye-sensitized solar cell （DSSC） is investigated. The results demonstrate that the PtNPs/graphene composite has high electrocatalytic activity for the dye-sensitized solar cell. The cell employing PtNPs （1.6 wt%）/graphene counter electrode reaches an conversion efficiency （η） of 3.89% upon the excitation of 100 mW/cm2 AM 1.5 white light, which is comparable to that of the cell with a Pt-film counter electrode （7 = 3.76%）. It suggests that one can use only 14% Pt content of the conventional Pt-film counter electrode to obtain a comparable conversion efficiency. It may be possible to obtain a high performance DSSC using the PtNPs/graphene composite with a very low Pt content as a counter electrode due to its simplicity, low cost, and large scalability.

关 键 词：GRAPHENE Pt nanoparticles counter electrode dye-sensitized solar cells 

分 类 号：TM914.4[电气工程—电力电子与电力传动]