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

Abstract

Organic–inorganic lead halide perovskites have recently emerged as highly competitive light absorbing materials for low cost solution-proce ssable photovoltaic devices. With the high efficiency already achieved, removing the toxicity, i.e., lead-free and stability are the key obstacles for perovskite solar cell. Here, we report the synthesis of antimony (Sb)-based hybrid material having the composition of A3Sb2I9 [A = CH3NH3 (MA), Cs] and an investigation of their potential photovoltaic application. The Sb-based perovskite like materials exhibited attractive absorbance properties, with the band gaps of MA3Sb2I9 and Cs3Sb2I9 measured as 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 MA3Sb2I9 perovskite like device—the highest reported to date for a Sb-based perovskite solar cell.

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Publication details

The article was received on 29 Jul 2017, accepted on 13 Sep 2017 and first published on 13 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA06679A
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Solution-processable antimony-based light-absorbing materials beyond lead halide perovskites

    K. M. Boopathi, P. Karuppuswamy, A. Singh, C. Hanmandlu, L. Lin, S. A. Abbas, C. Chang, P. Wang, G. Li and C. W. Chu, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA06679A

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