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Facile fabrication of perovskite layers with large grains through a solvent exchange approach

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Abstract

Large-grained perovskite layers with fewer defects are beneficial to minimize carrier recombination at grain boundaries, thus boosting cell performance. Here, we present a facile solvent exchange strategy (SES) to yield large-grained perovskite films with high reproducibility. Upon employing a stoichiometric PbI2 : MAI : DMSO (3 : 2 : 2) precursor solution, we reduced the number of colloidal intermediates (PbI42−) which is correlated with the nucleation of seeds, resulting in a perovskite thin layer with large grain sizes up to 2 μm. The SES prepared CH3NH3PbI3 devices show significantly reduced grain boundaries corresponding to the decrease of recombination centers, which dramatically boosted the efficiency up to 17.2%.

Graphical abstract: Facile fabrication of perovskite layers with large grains through a solvent exchange approach

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Publication details

The article was received on 06 Nov 2017, accepted on 03 Dec 2017 and first published on 04 Dec 2017


Article type: Research Article
DOI: 10.1039/C7QI00685C
Citation: Inorg. Chem. Front., 2018, Advance Article
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    Facile fabrication of perovskite layers with large grains through a solvent exchange approach

    Y. Ren, X. Shi, X. Ding, J. Zhu, T. Hayat, A. Alsaedi, Z. Li, X. Xu, S. Yang and S. Dai, Inorg. Chem. Front., 2018, Advance Article , DOI: 10.1039/C7QI00685C

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