Homogenous Alloys of Formamidinium Lead Triiodide and Cesium Tin Triiodide for Efficient Ideal-Bandgap Perovskite Solar Cells

Yingxia Zong, Ning Wang, Lin Zhang, Ming Gang Ju, Xiao Cheng Zeng, Xiao Wei Sun, Yuanyuan Zhou, Nitin P. Padture

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

The alloying behavior between FAPbI3 and CsSnI3 perovskites is studied carefully for the first time, which has led to the realization of single-phase hybrid perovskites of (FAPbI3)1−x(CsSnI3)x (0<x<1) compositions with anomalous bandgaps. (FAPbI3)1−x(CsSnI3)x perovskites exhibit stable, homogenous composition/microstructure at the nanoscale, as confirmed by microscopic characterization. The ideal bandgap of 1.3 eV for single-junction solar cell operation is achieved in the rationally-tailored (FAPbI3)0.7(CsSnI3)0.3-composition perovskite. Solar cells based on this new perovskite show power conversion efficiency up to 14.6 %.

Original languageEnglish (US)
Pages (from-to)12658-12662
Number of pages5
JournalAngewandte Chemie - International Edition
Volume56
Issue number41
DOIs
StatePublished - 2017

Keywords

  • alloys
  • bandgaps
  • compositions
  • hybrid perovskites
  • solar cells
  • thin-film photovoltaics

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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