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Facile Fabrication of Perovskite Layers with Large Grain through Solvent Exchange Approach

Abstract

Large-grained perovskite layers with less defects are beneficial to minimize carrier recombination at grain boundaries, hence 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 shows significantly reduced grain boundaries corresponding to decrease of recombination centers, which dramatically boosted the efficiency up to 17.2%.

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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., 2017, Accepted Manuscript
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    Facile Fabrication of Perovskite Layers with Large Grain through 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., 2017, Accepted Manuscript , DOI: 10.1039/C7QI00685C

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