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Issue 39, 2018
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A simple method for phase control in two-dimensional perovskite solar cells

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Abstract

Two-dimensional (2D) Image ID:c8ta06976j-t1.gif perovskites with n = 4 have attracted much attention recently and the low-n (e.g. n = 1) phases in these 2D perovskites have been found to act as carrier traps, leading to decreased performance. In this work, we demonstrate a simple method to suppress the formation of low-n phases by using dimethyl sulfoxide (DMSO) as a co-solvent. The present 2D perovskites with alternating cations in the interlayer space (ACI) exhibit enhanced carrier lifetime and charge transport by suppressing low-n phases. The optimized 2D ACI-based perovskite solar cell shows a PCE of 12.8%, which is also the highest efficiency for ACI-based perovskite solar cells, and is almost 3 times higher than that of the non-DMSO treated devices.

Graphical abstract: A simple method for phase control in two-dimensional perovskite solar cells

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Publication details

The article was received on 19 Jul 2018, accepted on 07 Sep 2018 and first published on 18 Sep 2018


Article type: Communication
DOI: 10.1039/C8TA06976J
J. Mater. Chem. A, 2018,6, 18871-18876

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    A simple method for phase control in two-dimensional perovskite solar cells

    C. Ma, M. Lo and C. Lee, J. Mater. Chem. A, 2018, 6, 18871
    DOI: 10.1039/C8TA06976J

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