Cost-efficient, Effect of Low-Quality PbI 2 Purification to Enhance Performances of Perovskite Quantum Dots and Perovskite Solar Cells

ChaeHyun Lee, YeJi Shin, Gyeong G. Jeon, Dongwoo Kang, Jiwon Jung, Byeongmin Jeon, Jongin Park, Jincheol Kim and Seog Joon Yoon
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ChaeHyun Lee: Department of Chemistry, College of Natural Science, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Korea
YeJi Shin: Department of Chemistry, College of Natural Science, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Korea
Gyeong G. Jeon: New & Renewable Energy Research Center, Korea Electronics Technology Institute, Seong-Nam 13509, Korea
Dongwoo Kang: Daegu Science High School, 154, Dongdaegu-ro, Daegu 42110, Korea
Jiwon Jung: Daegu Science High School, 154, Dongdaegu-ro, Daegu 42110, Korea
Byeongmin Jeon: Daegu Science High School, 154, Dongdaegu-ro, Daegu 42110, Korea
Jongin Park: Daegu Science High School, 154, Dongdaegu-ro, Daegu 42110, Korea
Jincheol Kim: New & Renewable Energy Research Center, Korea Electronics Technology Institute, Seong-Nam 13509, Korea
Seog Joon Yoon: Department of Chemistry, College of Natural Science, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Korea

Energies, 2021, vol. 14, issue 1, 1-12

Abstract: In modern society, high-quality material development and a large stable supply are key to perform frontier research and development. However, there are negative issues to address to utilize high-quality resources with a large stable supply for research, such as economic accessibility, commercialization, and so on. One of the cutting-edge research fields, perovskite-related research, usually requires high-quality chemicals with outstanding purity (>99%). We developed an economically feasible PbI 2 precursor with around 1/20 cost-down for perovskite/perovskite quantum dots through recrystallization and/or hydrothermal purification. Following the methodology, the quantum dots from both as-prepared and purified PbI 2 demonstrated identical photophysical properties, with a photoluminescence quantum yield (PLQY) of 52.61% using the purified PbI 2 vs. 45.83% PLQY using commercial PbI 2 . The role of hydrothermal energy was also checked against the problematic PbI 2, and we checked whether the hydrothermal energy could contribute to the hindrance of undesired particle formation in the precursor solution, which enables them to form enlarged grain size from 179 ± 80 to 255 ± 130 nm for higher photoconversion efficiency of perovskite solar cells from 14.77 ± 1.82% to 15.18 ± 1.92%.

Keywords: perovskite; perovskite quantum dots; perovskite solar cells; hydrothermal; perovskite precursor purification (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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