Transformative Evolution of Organolead Triiodide Perovskite Thin Films from Strong Room-Temperature Solid-Gas Interaction between HPbI3-CH3NH2 Precursor Pair

Mengjin Yang, Kai Zhu, Shuping Pang, Yuanyuan Zhou, Zaiwei Wang, Amanda Krause, Zhongmin Zhou, Nitin Padture, Guanglei Cui

Research output: Contribution to journalArticlepeer-review

152 Scopus Citations

Abstract

We demonstrate the feasibility of a nonsalt-based precursor pair - inorganic HPbI3 solid and organic CH3NH2 gas - for the deposition of uniform CH3NH3PbI3 perovskite thin films. The strong room-temperature solid-gas interaction between HPbI3 and CH3NH2 induces transformative evolution of ultrasmooth, full-coverage perovskite thin films at a rapid rate (in seconds) from nominally processed rough, partial-coverage HPbI3 thin films. The chemical origin of this behavior is elucidated via in situ experiments. Perovskite solar cells, fabricated using MAPbI3 thin films thus deposited, deliver power conversion efficiencies up to 18.2%, attesting to the high quality of the perovskite thin films deposited using this transformative process.

Original languageAmerican English
Pages (from-to)750-753
Number of pages4
JournalJournal of the American Chemical Society
Volume138
Issue number3
DOIs
StatePublished - 27 Jan 2016

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

NREL Publication Number

  • NREL/JA-5900-65865

Keywords

  • nonsalt-based precursors
  • perovskite thin films

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