Fabrication of Lead-Free (CH3NH3)3Bi2I9 Perovskite Photovoltaics in Ethanol Solvent

Haijin Li, Congcong Wu, Yongke Yan, Bo Chi, Jian Pu, Jian Li, Shashank Priya

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


The toxicity of lead present in organohalide perovskites and the hazardous solvent systems used for their synthesis hinder the deployment of perovskite solar cells (PSCs). Herein, an environmentally friendly route toward bismuth-based, lead-free (CH3NH3)3Bi2I9 perovskites that utilize ethanol as the solvent is described. Using this method, dense and homogeneous microstructures were obtained, compared to the porous, rough microstructures obtained using dimethylformamide. Photovoltaic performances were enhanced, with an open-circuit voltage of 0.84 V measured.

Original languageEnglish (US)
Pages (from-to)3994-3998
Number of pages5
Issue number20
StatePublished - Oct 23 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim


  • bismuth
  • green solvents
  • intercalation
  • lead-free
  • perovskites


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