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Issue 21, 2019, Issue in Progress
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Modifying morphology and defects of low-dimensional, semi-transparent perovskite thin films via solvent type

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Abstract

(PEA)2(MA)n−1PbnIn+1Br2n perovskites are semi-transparent, color-tunable thin films with broader band gaps. They have the potential for semi-transparent solar cell and smart window applications. Solvent engineering significantly alters the morphology, absorbance, crystallinity, charge separation, and defects, thereby influencing the optoelectronic properties. Herein, we investigated the effect of the solvent type on the low dimensional, mixed halide perovskite thin films (n = 1, 3, and 5) and identified DMF : DMSO = 8 : 2 as the most suitable solvent. The mixed solvent regulated the growth rate of perovskites, which led to the smooth morphology and larger crystallite size. Through surface photovoltage spectroscopy and time resolved photoluminescence, good charge separation and low defects were linked to DD82 usage.

Graphical abstract: Modifying morphology and defects of low-dimensional, semi-transparent perovskite thin films via solvent type

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Supplementary files

Article information


Submitted
05 Feb 2019
Accepted
30 Mar 2019
First published
16 Apr 2019

This article is Open Access

RSC Adv., 2019,9, 12047-12054
Article type
Paper

Modifying morphology and defects of low-dimensional, semi-transparent perovskite thin films via solvent type

J. Ponchai, P. Kaewurai, C. Boonthum, K. Pinsuwan, T. Supasai, S. Sahasithiwat and P. Kanjanaboos, RSC Adv., 2019, 9, 12047
DOI: 10.1039/C9RA00971J

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