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In-situ growth of low-dimensional perovskite-based insular nanocrystals for highly efficient light emitting diodes
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- Wang, Hao (author)
- ShanghaiTech Univ, Peoples R China; ShanghaiTech Univ, Peoples R China
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- Xu, Weidong (author)
- Northwestern Polytech Univ, Peoples R China
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- Wei, Qi (author)
- ShanghaiTech Univ, Peoples R China; ShanghaiTech Univ, Peoples R China
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- (creator_code:org_t)
- 2023-03-03
- 2023
- English.
- In: Light. - : SPRINGERNATURE. - 2095-5545 .- 2047-7538. ; 12:1
- Journal article (peer-reviewed)
Abstract
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- Regulation of perovskite growth plays a critical role in the development of high-performance optoelectronic devices. However, judicious control of the grain growth for perovskite light emitting diodes is elusive due to its multiple requirements in terms of morphology, composition, and defect. Herein, we demonstrate a supramolecular dynamic coordination strategy to regulate perovskite crystallization. The combined use of crown ether and sodium trifluoroacetate can coordinate with A site and B site cations in ABX(3) perovskite, respectively. The formation of supramolecular structure retard perovskite nucleation, while the transformation of supramolecular intermediate structure enables the release of components for slow perovskite growth. This judicious control enables a segmented growth, inducing the growth of insular nanocrystal consist of low-dimensional structure. Light emitting diode based on this perovskite film eventually brings a peak external quantum efficiency up to 23.9%, ranking among the highest efficiency achieved. The homogeneous nano-island structure also enables high-efficiency large area (1 cm(2)) device up to 21.6%, and a record high value of 13.6% for highly semi-transparent ones.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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- By the author/editor
- Wang, Hao
- Xu, Weidong
- Wei, Qi
- Peng, Si
- Shang, Yuequn
- Jiang, Xianyuan
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- Yu, Danni
- Wang, Kai
- Pu, Ruihua
- Zhao, Chenxi
- Zang, Zihao
- Li, Hansheng
- Zhang, Yile
- Pan, Ting
- Peng, Zijian
- Shen, Xiaoqin
- Ling, Shengjie
- Liu, Weimin
- Gao, Feng
- Ning, Zhijun
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- About the subject
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- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- and Condensed Matter ...
- Articles in the publication
- Light
- By the university
- Linköping University
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