Realizing Full Coverage of Stable Perovskite Film by Modified Anti-Solvent Process

Long Ji, Ting Zhang, Yafei Wang, Peng Zhang, Detao Liu, Zhi Chen, Shibin Li

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Lead-free solution-processed solid-state photovoltaic devices based on formamidinium tin triiodide (FASnI3) and cesium tin triiodide (CsSnI3) perovskite semiconductor as the light harvester are reported. In this letter, we used solvent engineering and anti-solvent dripping method to fabricate perovskite films. SnCl2 was used as an inhibitor of Sn4+ in FASnI3 precursor solution. We obtained the best films under the function of toluene or chlorobenzene in anti-solvent dripping method and monitored the oxidation of FASnI3 films in air. We chose SnF2 as an additive of CsSnI3 precursor solution to prevent the oxidation of the Sn2+, improving the stability of CsSnI3. The experimental results we obtained can pave the way for lead-free tin-based perovskite solar cells (PSCs).

Original languageEnglish
Article number367
JournalNanoscale Research Letters
Volume12
Issue number1
DOIs
StatePublished - 2017

Bibliographical note

Publisher Copyright:
© 2017, The Author(s).

Keywords

  • Anti-solvent dripping
  • Lead-free perovskite solar cells
  • Solvent engineering

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics

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