期刊
ADVANCED FUNCTIONAL MATERIALS
卷 25, 期 25, 页码 3925-3933出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201501024
关键词
methylammonium lead iodide; PbI2; perovskite; solution process; two-step method
类别
资金
- European Union Seventh Framework Programme [FP7] of the MESO project (FP7) [604032, ENERGY.2012.10.2.1]
- NANOMATCELL [308997]
- European Research Council (ERC) [ARG 247404]
The effect of the presence of unreacted PbI2 on the perovskite solar cells efficiency is reported. N,N-Dimethylformamide vapor treatment is introduced to study the influence of complete conversion to a power conversion efficiency of the device. It is discovered that the optimized morphology of the PbI2 under layer is essential to form a dense perovskite layer preventing recombination by direct contact between TiO2 and a hole transporting layer, and to increase the charge collection efficiency. The present findings provide an insight into the morphology and growth mechanism of perovskite layer, the correlation between the device performance, and the film deposition process.
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