Effect of Grephene on Separation and Transport Mechanism of Photogenerated Charges
Journal Title: 河南科技大学学报（自然科学版） - Year 2016, Vol 37, Issue 4
Abstract
Based on various mass fractions( 0. 4%,0. 8%,1. 2%,1. 6%,2. 0% and 2. 4%) of reduced graphene oxide( RGO),the composite system of Cu4Bi4S9( CBS) and RGO( CBS-RGO) were synthesized.Then two types of heterojunction Zn2SnO4/ CBS( ZTO / CBS) and ZTO / CBS-RGO( ZTO / CBS-RGO),as well as its bulk heterojunction solar cells were fabricated. For CBS-RGO,the photovoltaic response increased gradually with the mass fractions of RGO from 0. 4% to 1. 6%. Above 1. 6%,the photovoltaic response decreased gradually. The surface photovoltage spectroscopy test results show that ZTO / CBS-RGO exhibits the higher photovoltaic response than ZTO / CBS. Under the positive bias electric field inducing,ZTO / CBS-RGO also presents the higher photovoltaic response than ZTO / CBS. Besides,the highest photoelectric conversion efficiencies of two types of bulk heterojunction solar cells of ZTO / CBS and ZTO / CBS-RGO is 1. 2% and2. 8%,respectively. It is suggested that the composite RGO can improve the separation efficiency of photogenerated charges.
Authors and Affiliations
Taotao ZHAO, Gaofeng ZHAO
Keywords
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- EP ID EP477172
- DOI 10.15926/j.cnki.issn1672-6871.2016.04.018
- Views 52
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