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All green sulfolane-based solvent enhanced electrical conductivity and rigidity of perovskite crystalline layer
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Document Title
All green sulfolane-based solvent enhanced electrical conductivity and rigidity of perovskite crystalline layer
Author
Siripraparat A., Mittanonsakul P., Pansa-Ngat P., Seriwattanachai C., Kumnorkaew P., Kaewprajak A., Kanjanaboos P., Pakawatpanurut P.
Affiliations
Department of Chemistry, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand; Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok, 10400, Thailand; School of Materials Science and Innovation, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand; National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency, Thailand Science Park, Khlong Luang District, Pathum Thani12120, Thailand
Type
Article
Source Title
Scientific Reports
ISSN
20452322
Year
2023
Volume
13
Issue
1
Open Access
All Open Access, Gold, Green
Publisher
Nature Research
DOI
10.1038/s41598-023-36440-6
Format
Abstract
Industrial commercialization of perovskite solar cells not only depends on sufficient device performance, but also requires complete elimination of hazardous solvents in the fabrication process to enable sustainable development of the technology. This work reports a new solvent system based on sulfolane, ? -butyrolactone (GBL), and acetic acid (AcOH) as a significantly greener alternative to common but more hazardous solvents. Interestingly, this solvent system not only resulted in densely-packed perovskite layer of bigger crystal size and better crystallinity, the grain boundaries were found to be more rigid and highly conductive to electrical current. The physical changes at the grain boundaries were due to the sulfolane-infused crystal interfaces, which were expected to facilitate better charge transfer and provide stronger barrier to moisture within the perovskite layer, yielding higher current density and longer performance of the device as a result. In fact, by using a mixed solvent system consisting of sulfolane, GBL, and AcOH in the volume ratio of 70.0:27.5:2.5, the device stability was better and the photovoltaic performance was statistically comparable with those prepared using DMSO-based solvent. Our report reflects unprecedented findings of enhanced electrical conductivity and rigidity of the perovskite layer simply by using an appropriate choice of the all-green solvent. ? 2023, The Author(s).
License
CC BY
Rights
Authors
Publication Source
WOS