Photovoltaic Performance of Vapor-Assisted Solution-Processed Layer Polymorph of Cs3Sb2I9

Anupriya Singh, Karunakara Moorthy Boopathi, Anisha Mohapatra, Yang Fang Chen, Gang Li, Chih Wei Chu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

98 Citations (Scopus)


The presence of toxic lead (Pb) remains a major obstruction to the commercial application of perovskite solar cells. Although antimony (Sb)-based perovskite-like structures A3M2X9can display potentially useful photovoltaic behavior, solution-processed Sb-based perovskite-like structures usually favor the dimer phase, which has poor photovoltaic properties. In this study, we prepared a layered polymorph of Cs3Sb2I9through solution-processing and studied its photovoltaic properties. The exciton binding energy and exciton lifetime of the layer-form Cs3Sb2I9were approximately 100 meV and 6 ns, respectively. The photovoltaic properties of the layered polymorph were superior to those of the dimer polymorph. A solar cell incorporating the layer-form Cs3Sb2I9exhibited an open-circuit voltage of 0.72 V and a power conversion efficiency of 1.5% - the highest reported for an all-inorganic Sb-based perovskite.
Original languageEnglish
Pages (from-to)2566-2573
Number of pages8
JournalACS Applied Materials and Interfaces
Issue number3
Publication statusPublished - 1 Jan 2018


  • all-inorganic
  • antimony based
  • lead-free
  • perovskite solar cells
  • solution processed

ASJC Scopus subject areas

  • Materials Science(all)


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