Journal
DALTON TRANSACTIONS
Volume 48, Issue 16, Pages 5292-5298Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9dt00930b
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Funding
- National Natural Science Foundation of China [61704128, 61874083, 11435010]
- Natural Science Foundation of Shaanxi, China [2017JM6049, 2018JQ6039]
- Fundamental Research Funds for the Central Universities [JB181408]
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The quality of the perovskite layer plays a key role in the performance of perovskite solar cells (PSCs). In this work, we demonstrate a facile way to improve the quality of perovskite films by using a MAI/IPA solution to post-treat the perovskite material after the film formation. XRD, SEM and AFM show that an optimal, uniform, dense and highly crystalline perovskite film is achieved after the post-treatment. The transient photocurrent and transient photovoltage also confirm that the devices after the post-treatment have both the outstanding ability of charge extraction and suppressed charge recombination. By using the post-treatment, a maximum PCE of 19.08%, which is 12% higher than that of the control device, is obtained with a J(sc) of 23.12 mA cm(-2), a V-oc of 1.08 V and an FF of 76.03%. The results show that the MAI/IPA solution post-treatment after the perovskite film formation is a facile way to improve the film quality and the PSC performance.
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