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Effect of embedded chalcogenide quantum dots in PbBr2 film on CsPbBr3 inorganic perovskite solar cells

Title
Effect of embedded chalcogenide quantum dots in PbBr2 film on CsPbBr3 inorganic perovskite solar cells
Authors
Lee, Eui JinKim, Dae-HwanHwang, Dae-Kue
DGIST Authors
Lee, Eui Jin; Kim, Dae-HwanHwang, Dae-Kue
Issue Date
2020-10
Citation
Journal of Industrial and Engineering Chemistry, 90, 281-286
Type
Article
Article Type
Article
Author Keywords
CsPbBr3Perovskite solar cellMetal chalcogenide quantum dotLigand exchangeInorganic ligand
Keywords
EFFICIENCYZNPERFORMANCEEXTRACTIONSTABILITYLAYERCRYSTALLIZATIONCH3NH3PBI3
ISSN
1226-086X
Abstract
Inorganic perovskite solar cells (PSCs) are considered prospective alternatives to organic PSCs due to their efficiency and relative stability. Cesium lead bromide (CsPbBr3) has a complete perovskite structure, is phase stable, exhibits a wide bandgap energy of 2.3 eV under operating conditions, and is regarded as a suitable material not only for stable PSCs, but also for semi-transparent PSCs. In this study, we synthesize Cu–Zn–In–S–Se (CZISSe) quantum dots (QDs) and demonstrate their novel use for improving the performance of PSC devices. QDs are embedded through ligand-exchange, which replaces long organic chains with thiosulfate (–S2O3) ligands and disperses the S2O3-capped QDs in the PbBr2 solution to prepare QD-blended precursor inks. The QDs promote the crystallization of CsPbBr3 and hole extraction from the photoactive layer. As a result, the optimized power conversion efficiency (PCE) of the QD-incorporated PSC is 5.37%, which is a 22.6% enhancement compared to those of the control devices. This work provides an effective and simple process for enhancing the performance of CsPbBr3-based PSCs. © 2020 The Korean Society of Industrial and Engineering Chemistry
URI
http://hdl.handle.net/20.500.11750/12777
DOI
10.1016/j.jiec.2020.07.025
Publisher
한국공업화학회
Related Researcher
Files:
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Collection:
Division of Energy Technology1. Journal Articles


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