High-performance inverted planar heterojunction perovskite solar cells based on a solution-processed CuOx hole transport layer

Weihai Sun; Yunlong Li; Senyun Ye; Haixia Rao; Weibo Yan; Haitao Peng; Yu Li; Zhiwei Liu; Shufeng Wang; Zhijian Chen; Lixin Xiao; Zuqiang Bian; Chunhui Huang

doi:10.1039/c6nr01927g

High-performance inverted planar heterojunction perovskite solar cells based on a solution-processed CuOx hole transport layer

Nanoscale. 2016 May 19;8(20):10806-13. doi: 10.1039/c6nr01927g.

Authors

Weihai Sun¹, Yunlong Li², Senyun Ye², Haixia Rao², Weibo Yan², Haitao Peng², Yu Li³, Zhiwei Liu², Shufeng Wang³, Zhijian Chen³, Lixin Xiao³, Zuqiang Bian², Chunhui Huang²

Affiliations

¹ Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, Beijing, 100871, P. R. China. bianzq@pku.edu.cn zwliu@pku.edu.cn and Institute of Modern Optics and State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, P. R. China.
² Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, Beijing, 100871, P. R. China. bianzq@pku.edu.cn zwliu@pku.edu.cn.
³ Institute of Modern Optics and State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, P. R. China.

PMID: 27167080
DOI: 10.1039/c6nr01927g

Abstract

During the past several years, methylammonium lead halide perovskites have been widely investigated as light absorbers for thin-film photovoltaic cells. Among the various device architectures, the inverted planar heterojunction perovskite solar cells have attracted special attention for their relatively simple fabrication and high efficiencies. Although promising efficiencies have been obtained in the inverted planar geometry based on poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) sulfonic acid (

Pedot: PSS) as the hole transport material (HTM), the hydrophilicity of the

Pedot: PSS is a critical factor for long-term stability. In this paper, a CuOx hole transport layer from a facile solution-processed method was introduced into the inverted planar heterojunction perovskite solar cells. After the optimization of the devices, a champion PCE of 17.1% was obtained with an open circuit voltage (Voc) of 0.99 V, a short-circuit current (Jsc) of 23.2 mA cm(-2) and a fill factor (FF) of 74.4%. Furthermore, the unencapsulated device cooperating with the CuOx film exhibited superior performance in the stability test, compared to the device involving the

Pedot: PSS layer, indicating that CuOx could be a promising HTM for replacing

Pedot: PSS in inverted planar heterojunction perovskite solar cells.