Humidity-insensitive fabrication of efficient perovskite solar cells in ambient air

Feng Wang, Zongbiao Ye, Hojjatollah Sarvari, So Min Park, Ashkan Abtahi, Kenneth Graham, Yuetao Zhao, Yafei Wang, Zhi David Chen, Shibin Li

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Fabrication of perovskite solar cells (PSCs) is highly humidity-sensitive. In this paper, humidity-insensitive fabrication (HIF) of efficient CH3NH3PbI3 (MAPbI3) PSCs using an antisolvent method is demonstrated. Characterizations including scanning electron microscope (SEM), X-ray diffraction (XRD), UV–vis absorption and steady-state photoluminescence (PL) of the MAPbI3 films prepared in a glovebox(∼0% RH) and 50% RH ambient air using the antisolvent method are carried out. The quality of the MAPbI3 films shows no obvious difference in these two cases. By analyzing the crystallization processes, the greatly suppressed influence of humidity is ascribed to the rapid crystallization process due to the antisolvent method. The photovoltaic performances and storage stability of MAPbI3 PSCs prepared at a series of relative humidity (RH) levels below 60% are found similar. Their average power conversion efficiency (PCE) is over 15% with the best PCE of 16.9%. In addition, the influence of absorbed water in the hydrophilic precursor to MAPbI3 films and associated solar cells is investigated. The influence of equal molar absorbance of H2O is found ignorable. It is concluded that antisolvent method is an ideal HIF route for fabrication of efficient PSCs in ambient air and may pave the way for massive and low-cost manufacturing of solar panels.

Original languageEnglish
Pages (from-to)359-365
Number of pages7
JournalJournal of Power Sources
Volume412
DOIs
StatePublished - Feb 1 2019

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

Keywords

  • Anti-solvent method
  • CHNHPbI
  • Crystallization process
  • Humidity-insensitive fabrication
  • Perovskite solar cells

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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