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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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Unveiling the Relationship between the Perovskite Precursor Solution and the Resulting Device Performance

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Title
Unveiling the Relationship between the Perovskite Precursor Solution and the Resulting Device Performance
Author
Kim, JincheolPark, Byung-wookBaek, JonghoYun, Jae SungKwon, Hyoung-WooSeidel, JanMin, HanulCoelho, SimaoLim, SeanHuang, ShujuanGaus, KatharinaGreen, Martin A.Shin, Tae JooHo-Baillie, Anita W. Y.Kim, Min GyuSeok, Sang Il
Issue Date
2020-04
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.142, no.13, pp.6251 - 6260
Abstract
For the fabrication of perovskite solar cells (PSCs) using a solution process, it is essential to understand the characteristics of the perovskite precursor solution to achieve high performance and reproducibility. The colloids (iodoplumbates) in the perovskite precursors under various conditions were investigated by UV-visible absorption, dynamic light scattering, photoluminescence, and total internal reflection fluorescence microscopy techniques. Their local structure was examined by in situ X-ray absorption fine structure studies. Perovskite thin films on a substrate with precursor solutions were characterized by transmission electron microscopy, X-ray diffraction analysis, space-charge-limited current, and Kelvin probe force microscopy. The colloidal properties of the perovskite precursor solutions were found to be directly correlated with the defect concentration and crystallinity of the perovskite film. This work provides guidelines for controlling perovskite films by varying the precursor solution, making it possible to use colloid-engineered lead halide perovskite layers to fabricate efficient PSCs.
URI
https://scholarworks.unist.ac.kr/handle/201301/32202
URL
https://pubs.acs.org/doi/10.1021/jacs.0c00411
DOI
10.1021/jacs.0c00411
ISSN
0002-7863
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ECHE_Journal Papers
UCRF_Journal Papers
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