期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 8, 期 2, 页码 394-400出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.6b02578
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资金
- Basic Research Program of China [2013CB328705]
- National Natural Science Foundation of China [11574248, 61275034]
- Ph.D. Programs Foundation of Ministry of Education of China [20130201110065]
- International Cooperation by Shaanxi [2015KW-008]
- China Postdoctoral Science Foundation [2016M590947]
- Fundamental Research Funds for the Central Universities [xjj2016031]
A bismuth-based organohalide material, methylammonium bismuth iodide (MA(3)Bi(2)I(9)), has been recently explored as an efficient lead-free light absorber in photovoltaic applications. However, the poor surface morphology of the MA(3)Bi(2)I(9) film fabricated via conventional one-step spin-coating methods has limited the performance of the device. In this work, a smooth, uniform, and compact MA(3)Bi(2)I(9) thin film was realized by a novel two-step evaporation spin-coating film fabrication strategy for the first time. Taking advantage of the superior MA(3)Bi(2)I(9) thin film, the best-performing inverted planar heterojuncion photovoltaic device exhibited a power conversion efficiency of 0.39% with open-circuit voltage as high as 0.83 V, which demonstrated the lowest loss-in-potential to date in MA(3)Bi(2)I(9)-based solar cells. Moreover, the facile film fabrication strategy utilized in this work paves the way for high reproducibility of lead-free organohalide films and devices.
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