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Issue 3, 2018
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Electric-field assisted perovskite crystallization for high-performance solar cells

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Abstract

We develop an external-electric-field (EEF)-assisted annealing treatment to improve the photoelectric performance of planar organic–inorganic perovskite solar cells (PSCs). The new strategy can control the ion polarization orientation of perovskite films to obtain a good crystallization film and enhance the built-in electric field (BIF), which facilitates the effective promotion of charge separation and transport. Under an optimized treatment of up-EEF-assisted (2.5 V μm−1) annealing, the power conversion efficiency (PCE) of the inverted PSC is improved from 15.33% to 17.26%, and from 16.77% to 19.18% for regular PSCs, compared with the thermal-annealing-only process. The ion polarization and ferroelectricity in the perovskite layer induced by the EEF are intensively discussed. The finding in this work provides a new route to improve perovskite film quality and cell performance.

Graphical abstract: Electric-field assisted perovskite crystallization for high-performance solar cells

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Supplementary files

Publication details

The article was received on 17 Sep 2017, accepted on 08 Dec 2017 and first published on 08 Dec 2017


Article type: Paper
DOI: 10.1039/C7TA08204E
Citation: J. Mater. Chem. A, 2018,6, 1161-1170
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    Electric-field assisted perovskite crystallization for high-performance solar cells

    C. Zhang, Z. Wang, M. Li, Z. Liu, J. Yang, Y. Yang, X. Gao and H. Ma, J. Mater. Chem. A, 2018, 6, 1161
    DOI: 10.1039/C7TA08204E

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