Thermally Evaporated Methylammonium Tin Triiodide Thin Films for Lead-Free Perovskite Solar Cell Fabrication

Kai Zhu, Yue Yu, Dewei Zhao, Corey Grice, Weiwei Meng, Changlei Wang, Weiqiang Liao, Alexander Cimaroli, Hongmei Zhang, Yanfa Yan

Research output: Contribution to journalArticlepeer-review

111 Scopus Citations

Abstract

We report on the synthesis of methylammonium tin triiodide (MASnI3) thin films at room temperature by a hybrid thermal evaporation method and their application in fabricating lead (Pb)-free perovskite solar cells. The as-deposited MASnI3 thin films exhibit smooth surfaces, uniform coverage across the entire substrate, and strong crystallographic preferred orientation along the 〈100〉 direction. By incorporating this film with an inverted planar device architecture, our Pb-free perovskite solar cells are able to achieve an open-circuit voltage (Voc) up to 494 mV. The relatively high Voc is mainly ascribed to the excellent surface coverage, the compact morphology, the good stoichiometry control of the MASnI3 thin films, and the effective passivation of the electron-blocking and hole-blocking layers. Our results demonstrate the potential capability of the hybrid evaporation method to prepare high-quality Pb-free MASnI3 perovskite thin films which can be used to fabricate efficient Pb-free perovskite solar cells.

Original languageAmerican English
Pages (from-to)90248-90254
Number of pages7
JournalRSC Advances
Volume6
Issue number93
DOIs
StatePublished - 2016

Bibliographical note

Publisher Copyright:
© 2016 The Royal Society of Chemistry.

NREL Publication Number

  • NREL/JA-5900-67300

Keywords

  • fabrication
  • methylammonium tin triiodide
  • synthesis
  • thin films

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