A Scalable Methylamine Gas Healing Strategy for High-Efficiency Inorganic Perovskite Solar Cells

Zhipeng Shao; Zaiwei Wang; Zhipeng Li; Yingping Fan; Hongguang Meng; Ranran Liu; Yan Wang; Anders Hagfeldt; Guanglei Cui; Shuping Pang

doi:10.1002/anie.201814024

A Scalable Methylamine Gas Healing Strategy for High-Efficiency Inorganic Perovskite Solar Cells

Angew Chem Int Ed Engl. 2019 Apr 16;58(17):5587-5591. doi: 10.1002/anie.201814024. Epub 2019 Mar 19.

Authors

Zhipeng Shao¹, Zaiwei Wang², Zhipeng Li^{1

3}, Yingping Fan^{1

3}, Hongguang Meng¹, Ranran Liu^{1

3}, Yan Wang¹, Anders Hagfeldt², Guanglei Cui¹, Shuping Pang^{1

4}

Affiliations

¹ Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, P. R. China.
² Laboratory of Photomolecular Science, Institute of Chemical Sciences Engineering, Ecole Polytechnique Fedérale de Lausanne (EPFL), 1015, Lausanne, Switzerland.
³ Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
⁴ Dalian National Laboratory for Clean Energy, Dalian, 116023, P. R. China.

PMID: 30779292
DOI: 10.1002/anie.201814024

Abstract

An easy and scalable methylamine (MA) gas healing method was realized for inorganic cesium-based perovskite (CsPbX₃ ) layers by incorporating a certain amount of MAX (X=I or Br) initiators into the raw film. It was found that the excess MAX accelerated the absorption of the MA gas into the CsPbX₃ film and quickly turned it into a liquid intermediate phase. Through the healing process, a highly uniform and highly crystalline CsPbX₃ film with enhanced photovoltaic performance was obtained. Moreover, the chemical interactions between a series of halides and MA gas molecules were studied, and the results could offer guidance in further optimizations of the healing strategy.

Keywords: defect healing; inorganic perovskites; methylamine; solar cells; thin films.

Abstract

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