Efficient planar heterojunction perovskite solar cells employing graphene oxide as hole conductor

Zhongwei Wu; Sai Bai; Jian Xiang; Zhongcheng Yuan; Yingguo Yang; Wei Cui; Xingyu Gao; Zhuang Liu; Yizheng Jin; Baoquan Sun

doi:10.1039/C4NR03181D

Efficient planar heterojunction perovskite solar cells employing graphene oxide as hole conductor†

Zhongwei Wu,^a Sai Bai,^b Jian Xiang,^a Zhongcheng Yuan,^a Yingguo Yang,^c Wei Cui,^a Xingyu Gao,^c Zhuang Liu,^a Yizheng Jin^b and Baoquan Sun*^a

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* Corresponding authors

^a Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren'ai Road, Suzhou, People's Republic of China
E-mail: bqsun@suda.edu.cn

^b State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China

^c Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 239 Zhangheng Road, Pudong New Area, Shanghai 201204, People's Republic of China

Abstract

Graphene oxide (GO) is employed as a hole conductor in inverted planar heterojunction perovskite solar cells, and the devices with CH₃NH₃PbI_3−xCl_x as absorber achieve an efficiency of over 12%. The perovskite film grown on GO exhibits enhanced crystallization, high surface coverage ratio as well as preferred in-plane orientation of the (110) plane. Efficient hole extraction from the perovskite to GO is demonstrated.

Nanoscale

Efficient planar heterojunction perovskite solar cells employing graphene oxide as hole conductor†

Abstract

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