Efficient and stable perovskite solar cells prepared in ambient air irrespective of the humidity

Qidong Tai, Peng You, Hongqian Sang, Zhike Liu, Chenglong Hu, Helen L.W. Chan, Feng Yan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

336 Citations (Scopus)

Abstract

Poor stability of organic-inorganic halide perovskite materials in humid condition has hindered the success of perovskite solar cells in real applications since controlled atmosphere is required for device fabrication and operation, and there is a lack of effective solutions to this problem until now. Here we report the use of lead (II) thiocyanate (Pb(SCN)2) precursor in preparing perovskite solar cells in ambient air. High-quality CH3NH3PbI3-x(SCN)xperovskite films can be readily prepared even when the relative humidity exceeds 70%. Under optimized processing conditions, we obtain devices with an average power conversion efficiency of 13.49% and the maximum efficiency over 15%. In comparison with typical CH3NH3PbI3-based devices, these solar cells without encapsulation show greatly improved stability in humid air, which is attributed to the incorporation of thiocyanate ions in the crystal lattice. The findings pave a way for realizing efficient and stable perovskite solar cells in ambient atmosphere.
Original languageEnglish
Article number11105
JournalNature Communications
Volume7
DOIs
Publication statusPublished - 1 Apr 2016

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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