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Narrowing the Phase Distribution of Quasi-2D Perovskites for Stable Deep-Blue Electroluminescence
- Title
- Narrowing the Phase Distribution of Quasi-2D Perovskites for Stable Deep-Blue Electroluminescence
- Authors
- Nah, Yoonseo; Solanki, Devan; Dong, Yitong; Rohr, Jason A.; Taylor, Andre D.; Hu, Shu; Sargent, Edward H.; Kim, Dong Ha
- Ewha Authors
- 김동하
- SCOPUS Author ID
- 김동하
- Issue Date
- 2022
- Journal Title
- ADVANCED SCIENCE
- ISSN
- 2198-3844
- Citation
- ADVANCED SCIENCE vol. 9, no. 24
- Keywords
- antisolvent engineering; blue light-emitting diodes; deep-blue electroluminescence; energy landscape; evaporation kinetics; quantum well dispersity; quasi-2D perovskites
- Publisher
- WILEY
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Solution-processed quasi-2D perovskites contain multiple quantum wells with a broad width distribution. Inhomogeneity results in the charge funneling into the smallest bandgap components, which hinders deep-blue emission and accelerates Auger recombination. Here, a synthetic strategy applied to a range of quasi-2D perovskite systems is reported, that significantly narrows the quantum well dispersity. It is shown that the phase distribution in the perovskite film is significantly narrowed with controlled, simultaneous evaporation of solvent and antisolvent. Modulation of film formation kinetics of quasi-2D perovskite enables stable deep-blue electroluminescence with a peak emission wavelength of 466 nm and a narrow linewidth of 14 nm. Light emitting diodes using the perovskite film show a maximum luminance of 280 cd m(-2) at an external quantum efficiency of 0.1%. This synthetic approach will serve in producing new materials widening the color gamut of next-generation displays.
- DOI
- 10.1002/advs.202201807
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
- Files in This Item:
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Advanced Science - 2022 - Nah - Narrowing the Phase Distribution of Quasi‐2D Perovskites for Stable Deep‐Blue.pdf(2.57 MB)
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