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Seok, Sang Il
Laboratory for Energy Harvesting Materials and Systems (LEHMS)
Research Interests
  • Solar energy conversion, perovskite solar cells, inorganic-organic hybrid materials and processing, solution chemistry

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Efficient perovskite solar mini-modules fabricated via bar-coating using 2-methoxyethanol-based formamidinium lead tri-iodide precursor solution

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Title
Efficient perovskite solar mini-modules fabricated via bar-coating using 2-methoxyethanol-based formamidinium lead tri-iodide precursor solution
Author
Yoo, Jin WookJang, JihunKim, UnsooLee, YonghuiJi, Sang-GeunNoh, EunseoHong, SungtakChoi, MansooSeok, Sang Il
Issue Date
2021-09
Publisher
CELL PRESS
Citation
JOULE, v.5, no.9, pp.2420 - 2436
Abstract
In small-area perovskite solar cells, efficiencies of >25% have been achieved using an antisolvent dripping technique; however, it is not applicable for coatings on an industrial scale. Currently, largearea devices based on scalable perovskite coatings still show a very large gap with small- area devices. This means that a uniform perovskite coating and defect control on large-area devices are not as secure as they are on small devices. Here, we report the deposition of dense and uniform perovskite films using an air-knife-assisted bar-coating employing a perovskite [(FAPbI(3))(0.95)(MAPbBr(3))(0.05)] precursor solution dissolved in 2- methoxyethanol. A pinhole-free and homogeneous surface morphology was achieved by adding n-cyclohexyl-2-pyrrolidone to ensure a balance between rapid nucleation and slowed crystal growth in the precursor solution. By applying surface passivation with acetylcholine bromide and laser etching to thin layers, mini-modules with an aperture area of 31 cm(2) were fabricated, attaining an efficiency of >20% (17.53% in the efficiency certified by a quasi-steady-state protocol).
URI
https://scholarworks.unist.ac.kr/handle/201301/54169
URL
https://www.sciencedirect.com/science/article/pii/S2542435121003895?via%3Dihub
DOI
10.1016/j.joule.2021.08.005
ISSN
2542-4351
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