Photovoltaic Performance of Vapor-Assisted Solution-Processed Layer Polymorph of Cs 3 Sb 2 I 9
Journal
ACS Applied Materials and Interfaces
Pages
2566-2573
Date Issued
2017
Author(s)
Singh, A.
Abstract
The 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. © 2017 American Chemical Society.
Subjects
all-inorganic; antimony based; lead-free; perovskite solar cells; solution processed
SDGs
Other Subjects
Antimony compounds; Binding energy; Cesium compounds; Excitons; Open circuit voltage; Perovskite; Perovskite solar cells; Photovoltaic effects; Semiconductor quantum wells; all-inorganic; Commercial applications; Exciton-binding energy; Lead-Free; Perovskite like structure; Photovoltaic performance; Power conversion efficiencies; Solution-processed; Iodine compounds
Type
journal article