期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 3, 页码 2566-2573出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b16349
关键词
perovskite solar cells; lead-free; antimony based; all-inorganic; solution processed
资金
- Ministry of Science and Technology (MOST) of Taiwan [104-2221-E-001-014-MY3]
- Career Development Award of Academia Sinica, Taiwan [103-CDA-M01]
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 A(3)M(2)X(9) 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.
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