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Download filePhotovoltaic Performance of Vapor-Assisted Solution-Processed Layer Polymorph of Cs3Sb2I9
journal contribution
posted on 2017-12-27, 00:00 authored by Anupriya Singh, Karunakara Moorthy Boopathi, Anisha Mohapatra, Yang Fang Chen, Gang Li, Chih Wei ChuThe presence of toxic lead (Pb) remains
a major obstruction to the commercial application of perovskite solar
cells. Although antimony (Sb)-based perovskite-like structures A3M2X9 can 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 Cs3Sb2I9 through solution-processing and
studied its photovoltaic properties. The exciton binding energy and
exciton lifetime of the layer-form Cs3Sb2I9 were 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 Cs3Sb2I9 exhibited 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.