Solution-processable antimony-based light-absorbing materials beyond lead halide perovskites

Karunakara Moorthy Boopathi, Priyadharsini Karuppuswamy, Anupriya Singh, Chintam Hanmandlu, Lin Lin, Syed Ali Abbas, Chien Cheng Chang, Pen Cheng Wang, Gang Li, Chih Wei Chu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

105 Citations (Scopus)


Organic-inorganic lead halide perovskites have recently emerged as highly competitive light absorbing materials for low cost solution-processable photovoltaic devices. With the high efficiency already achieved, removing the toxicity, i.e., lead-free and stability are the key obstacles for perovskite solar cells. Here, we report the synthesis of an antimony (Sb)-based hybrid material having the composition of A3Sb2I9[A = CH3NH3(MA), Cs] and an investigation of its potential photovoltaic applications. Sb-based perovskite-like materials exhibited attractive absorbance properties, with the band gaps of MA3Sb2I9and Cs3Sb2I9measured to be 1.95 and 2.0 eV, respectively. X-ray photoelectron spectroscopy confirmed the formation of stoichiometric perovskites from appropriate precursor molar ratios incorporated with hydroiodic acid (HI). Planar hybrid Sb-based solar cells exhibited negligible hysteresis and reproducible power output under working conditions. A power conversion efficiency of 2.04% was achieved by the MA3Sb2I9perovskite-based device - the highest reported to date for a Sb-based perovskite solar cell.
Original languageEnglish
Pages (from-to)20843-20850
Number of pages8
JournalJournal of Materials Chemistry A
Issue number39
Publication statusPublished - 1 Jan 2017

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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