An efficient, flexible perovskite solar module exceeding 8% prepared with an ultrafast PbI2 deposition rate

Kunpeng Li; Junyan Xiao; Xinxin Yu; Tianhui Li; Da Xiao; Jiang He; Peng Zhou; Yangwen Zhang; Wangnan Li; Zhiliang Ku; Jie Zhong; Fuzhi Huang; Yong Peng; Yibing Cheng

doi:10.1038/s41598-017-18970-y

An efficient, flexible perovskite solar module exceeding 8% prepared with an ultrafast PbI₂ deposition rate

Sci Rep. 2018 Jan 11;8(1):442. doi: 10.1038/s41598-017-18970-y.

Authors

Kunpeng Li¹, Junyan Xiao¹, Xinxin Yu¹, Tianhui Li¹, Da Xiao¹, Jiang He¹, Peng Zhou¹, Yangwen Zhang¹, Wangnan Li², Zhiliang Ku¹, Jie Zhong¹, Fuzhi Huang¹, Yong Peng³, Yibing Cheng^{1

4}

Affiliations

¹ State key lab of advanced technology for materials synthesis and processing, Wuhan University of Technology, Wuhan, 430070, China.
² Hubei key laboratory of low dimensional optoelectronic materials and devices, Hubei University of Arts and Science, Xiangyang, 441053, China.
³ State key lab of advanced technology for materials synthesis and processing, Wuhan University of Technology, Wuhan, 430070, China. yongpeng@whut.edu.cn.
⁴ Department of materials science, Monash University, Melbourne, VIC 3800, Australia.

Abstract

Large-area, pinhole-free CH₃NH₃PbI₃ perovskite thin films were successfully fabricated on 5 cm × 5 cm flexible indium tin oxide coated polyethylene naphthalate (ITO-PEN) substrates through a sequential evaporation/spin-coating deposition method in this research. The influence of the rate-controlled evaporation of PbI₂ films on the quality of the perovskite layer and the final performance of the planar-structured perovskite solar cells were investigated. An ultrafast evaporation rate of 20 Å s^-1 was found to be most beneficial for the conversion of PbI₂ to CH₃NH₃PbI₃ perovskite. Based on this high-quality CH₃NH₃PbI₃ film, a resultant flexible perovskite solar sub-module (active area of 16 cm²) with a power conversion efficiency of more than 8% and a 1.2 cm² flexible perovskite solar cell with a power conversion efficiency of 12.7% were obtained.

Publication types

Research Support, Non-U.S. Gov't