信阳师范学院学报（自然科学版）2016，Vol.29Issue(4)：512-518,7.DOI:10.3969/j.issn.1003-0972.2016.04.007
异质结光生电荷分离机制与光电性质研究
Study of Separation Mechanism of Photogenerated Charges and Photoelectric Properties in Heterojunction
摘要
Abstract
Reduced graphene oxide (RGO)with various mass percent (0.4,0.8,1.2,1.6,2.0 and 2.4 wt.%)was incorporated into Cu4 Bi4 S9 to fabricate different composites (CBS-RGO).With ZnO nanowires as e-lectron acceptor,CBS-RGO (or CBS nanoribbons)as electron donor,two types of heterojunctions (ZnO/CBS and ZnO/CBS-RGO),as well as bulk heterojunction (BHJ)solar cells were studied in detail.RGO from 0.4 to 1.6 wt.%,the surface photovoltage (SPV)of CBS-RGO increased gradually.There is the highest SPV at RGO of 1.6 wt.%.However,the SPV decreased continuously with RGO in excess 1.6 wt.%.Here,ZnO/CBS-RGO exhibits the higher photovoltaic response than that of ZnO/CBS.Under the same positive bias,ZnO/CBS-RGO also presents the more excellent SPV than that of ZnO/CBS.With the bias increasing,the SPV of ZnO/CBS-RGO improved very quickly.Based on RGO of 1.6 wt.%,two types of BHJ solar cells of ZnO/CBS and ZnO/CBS-RGO exhibit the highest photoelectric conversion efficiencies of 1.5% and 3.6%,respectively.From thick-ness of film,energy level matching,contact interface of CBS and RGO,RGO conductive network,as well as RGO remarkably high electron mobility,the separation mechanism of photogenerated charges and the effect of multichannel improved transport were analysed in BHJ.关键词
光伏响应/ZnO/CBS-RGO/体相异质结太阳能电池Key words
photovoltaic response/ZnO/CBS-RGO/bulk heterojunction solar cells分类
数理科学引用本文复制引用
赵涛涛,史朝阳..异质结光生电荷分离机制与光电性质研究[J].信阳师范学院学报（自然科学版）,2016,29(4):512-518,7.基金项目
河南省科技计划项目(132300410236) （132300410236）
河南大学自然科学重点研究项目(2012ZRZD01) （2012ZRZD01）
