Solution-processable antimony-based light-absorbing materials beyond lead halide perovskites. Issue 39 (27th September 2017)

• Record Type: Journal Article
• Authors: Boopathi, Karunakara Moorthy; Karuppuswamy, Priyadharsini; Singh, Anupriya; Hanmandlu, Chintam; Lin, Lin; Abbas, Syed Ali; Chang, Chien Cheng; Wang, Pen Cheng; Li, Gang; Chu, Chih Wei
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 39(2017)
• Page Start: 20843
• Page End: 20850
• Publication Date: 2017-09-27
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta06679a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Lead-free antimony based metal halide perovskites were used as photoactive materials in solar cell devices and exhibited maximum power conversion efficiency of 2.04%. 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 A3 Sb2 I9 [A = CH3 NH3 (MA), Cs] and an investigation of its potential photovoltaic applications. Sb-based perovskite-like materials exhibited attractive absorbance properties, with the band gaps of MA3 Sb2 I9 and Cs3 Sb2 I9 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 MA3 Sb2 I9 perovskite-based device—the highest reported to date for a Sb-based perovskite solar cell.