Unraveling the Reasons for Efficiency Loss in Perovskite Solar Cells

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.


Published in:
Advanced Functional Materials, 25, 25, 3925-3933
Year:
2015
Publisher:
Weinheim, Wiley-Blackwell
ISSN:
1616-301X
Keywords:
Laboratories:




 Record created 2015-09-28, last modified 2018-03-17


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