Blown Bubble Assembly of Graphene Oxide Patches for Transparent Electrodes in Carbon–Silicon Solar Cells

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• 作者：Shiting Wu ; Yanbing Yang ; Yitan Li ; Chunhui Wang ; Wenjing Xu ; Enzheng Shi ; Mingchu Zou ; Liusi Yang ; Xiangdong Yang ; Yan Li ; Anyuan Cao
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：December 30, 2015
• 年：2015
• 卷：7
• 期：51
• 页码：28330-28336
• 全文大小：571K
• ISSN：1944-8252

文摘

Graphene oxide (GO) sheets have a strong tendency to aggregate, and their interfaces can impose limitations on the electrical conductivity, which would hinder practical applications. Here, we present a blown bubble film method to assemble GO sheets with a uniform distribution over a large area and further interconnect individual GO sheets by transforming the bubble film into graphitized carbon. A conventional polymer was used to facilitate the bubble blowing process and disperse GO sheets in the bubble. Then, the bubble film was annealed on a Cu substrate, resulting in a highly transparent reduced GO (RGO)–carbon hybrid structure consisting of RGO patches well adhered to the carbon film. We fabricated RGO–carbon/Si solar cells with power conversion efficiencies up to 6.42%, and the assembled RGO patches hybridized with carbon film can form an effective junction with Si, indicating potential applications in thin film electronic devices and photovoltaics.