Enhanced planar perovskite solar cell efficiency and stability using a perovskite/PCBM heterojunction formed in one step

Perovskite/PCBM heterojunctions are efficient for fabricating perovskite solar cells with high performance and long-term stability. In this study, an efficient perovskite/PCBM heterojunction was formed via conventional sequential deposition and one-step formation processes. Compared with conventiona...

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Bibliographic Details
Published in:Nanoscale 2018-01, Vol.10 (6), p.3053-3059
Main Authors: Zhou, Long, Chang, Jingjing, Liu, Ziye, Sun, Xu, Lin, Zhenhua, Chen, Dazheng, Zhang, Chunfu, Zhang, Jincheng, Hao, Yue
Format: Article
Language:English
Subjects:
Carrier recombination
Deposition
Heterojunctions
Photovoltaic cells
Solar cells
Stability
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Summary:Perovskite/PCBM heterojunctions are efficient for fabricating perovskite solar cells with high performance and long-term stability. In this study, an efficient perovskite/PCBM heterojunction was formed via conventional sequential deposition and one-step formation processes. Compared with conventional deposition, the one-step process was more facile, and produced a perovskite thin film of substantially improved quality due to fullerene passivation. Moreover, the resulting perovskite/PCBM heterojunction exhibited more efficient carrier transfer and extraction, and reduced carrier recombination. The perovskite solar cell device based on one-step perovskite/PCBM heterojunction formation exhibited a higher maximum PCE of 17.8% compared with that from the conventional method (13.7%). The device also showed exceptional stability, retaining 83% of initial PCE after 60 days of storage under ambient conditions.
ISSN:2040-3364
2040-3372
DOI:10.1039/c7nr07753j