Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/74769
Title: Solution-processable antimony-based light-absorbing materials beyond lead halide perovskites
Authors: Boopathi, KM
Karuppuswamy, P
Singh, A
Hanmandlu, C
Lin, L
Abbas, SA
Chang, CC
Wang, PC
Li, G 
Chu, CW
Issue Date: 2017
Publisher: Royal Society of Chemistry
Source: Journal of materials chemistry A, 2017, v. 5, no. 39, p. 20843-20850 How to cite?
Journal: Journal of materials chemistry A 
Abstract: 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 MA3Sb2I9 and Cs3Sb2I9 measured 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 MA3Sb2I9 perovskite-based device - the highest reported to date for a Sb-based perovskite solar cell.
URI: http://hdl.handle.net/10397/74769
ISSN: 2050-7488
EISSN: 2050-7496
DOI: 10.1039/c7ta06679a
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