Fabrication of efficient and stable perovskite solar cells in high-humidity environment through trace-doping of large-sized cations

Xueping Liu, Jiang He, Pengfei Wang, Yuhao Liu, Junyan Xiao, Zhiliang Ku, Yong Peng, Fuzhi Huang, Yi Bing Cheng, Jie Zhong

Research output: Contribution to journalArticleResearchpeer-review

6 Citations (Scopus)

Abstract

Solution-processed organic–inorganic lead halide perovskites have shown photovoltaic performance above 23 %, attracting great attention. However, the champion devices require fabrication in a controlled inert/dry atmosphere. The development of highly efficient and stable perovskite solar cells under high-humidity atmosphere conditions for future commercialization is still challenging, especially for CH3NH3PbI3 (MAPbI3), which is vulnerable to moisture. In this study, a large-sized tert-butylammonium [C(CH3)3NH3+] organic cation was incorporated into the MAPbI3 crystalline structure, which could form a more stable 3 D crystalline structure and alleviate the decomposition caused by the humidity. It delivered a power conversion efficiency of 19.3 % upon preparation under a humid environment condition of 50 % relative humidity as well as improved humidity and thermal stability. Our work provides a facile strategy for improving perovskite performance and stability by introducing a new chemical additive for the future application of perovskite solar cells.

Original languageEnglish
Pages (from-to)2385-2392
Number of pages8
JournalChemSusChem
Volume12
Issue number11
DOIs
Publication statusPublished - 7 Jun 2019

Keywords

  • humid conditions
  • MAPbI
  • organic cations
  • perovskite solar cells
  • X-ray diffraction

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