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Monodisperse Perovskite Colloidal Quantum Dots Enable High-Efficiency Photovoltaics
- Title
- Monodisperse Perovskite Colloidal Quantum Dots Enable High-Efficiency Photovoltaics
- Authors
- Lim, Seyeong; Lee, Gyudong; Han, Sanghun; Kim, Jigeon; Yun, Sunhee; Lim, Jongchul; Pu, Yong Jin; Ko, Min Jae; Park, Taiho; Choi, Jongmin; Kim, Younghoon
- DGIST Authors
- Lim, Seyeong; Lee, Gyudong; Han, Sanghun; Kim, Jigeon; Yun, Sunhee; Lim, Jongchul; Pu, Yong Jin; Ko, Min Jae; Park, Taiho; Choi, Jongmin; Kim, Younghoon
- Issue Date
- 2021-05
- Citation
- ACS Energy Letters, 6(6), 2229-2237
- Type
- Article
- Keywords
- Conversion efficiency; Efficiency; Gel permeation chromatography; Ion beams; Lead compounds; Nanocrystals; Open circuit voltage; Perovskite; Purification; Quantum chemistry; Quantum efficiency; Photovoltaic performance; Power conversion efficiencies; Size selection; Synthetic routes; Perovskite solar cells; Semiconductor quantum dots; Sols; Volcanic rocks; Carrier transport; Photoluminescence quantum yields; Colloidal quantum dots; Full widths at half maximums; High-efficiency
- ISSN
- 2380-8195
- Abstract
- Bandtail broadening originating from increasing the polydispersity of colloidal quantum dots (CQDs) deteriorates open-circuit voltage (VOC) and hinders charge-carrier transport in CQD photovoltaics. The development of colloidal synthetic routes has enabled preparing monodisperse perovskite CQDs (Pe-CQDs) that have attracted attention as promising absorbers in CQD photovoltaics. However, polar-antisolvent-based purification induces the dissolution and agglomeration of Pe-CQDs, resulting in an irregular size distribution. Consequently, the photovoltaic performance decreases because of the increase in Pe-CQD polydispersity. Here, we demonstrate the preparation of well-purified monodisperse CsPbI3-Pe-CQDs via size selection on the basis of gel permeation chromatography. Well-purified monodisperse Pe-CQDs exhibit improved photovoltaic performance and achieve a low Pe-CQD polydispersity. Furthermore, these Pe-CQDs show higher photoluminescence quantum yields, narrower full-widths at half-maximum, and lower Urbach energies, in comparison to irregular-sized Pe-CQDs without size selection. Therefore, CsPbI3-Pe-CQD solar cells comprising monodisperse Pe-CQDs show the highest power conversion efficiency (15.3%) and VOC (1.27 V) among the fully inorganic CsPbI3-Pe-CQD solar cells reported so far. © 2021 American Chemical Society.
- URI
- http://hdl.handle.net/20.500.11750/15446
- DOI
- 10.1021/acsenergylett.1c00462
- Publisher
- American Chemical Society
- Related Researcher
-
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Choi, Jongmin
Chemical & Energy Materials Engineering (CEME) Laboratory
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Research Interests
Advanced Metal Oxides; Colloidal Quantum Dots; Perovskite-Quantum Dot Hybrid Nanomaterials; Photocatalytic Materials
- Files:
There are no files associated with this item.
- Collection:
- Department of Energy Science and EngineeringChemical & Energy Materials Engineering (CEME) Laboratory1. Journal Articles
Division of Energy Technology1. Journal Articles
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