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

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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.

Original languageEnglish
Article number442
Number of pages8
JournalScientific Reports
Publication statusPublished - 11 Jan 2018

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