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Minimising efficien...
Minimising efficiency roll-off in high-brightness perovskite light-emitting diodes
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- Zou, Wei (author)
- Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China
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- Li, Renzhi (author)
- Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China
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- Zhang, Shuting (author)
- Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China
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- Liu, Yunlong (author)
- Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China; Liaocheng Univ, Peoples R China
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- Wang, Nana (author)
- Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China
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- Cao, Yu (author)
- Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China
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- Miao, Yanfeng (author)
- Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China
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- Xu, Mengmeng (author)
- Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China
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- Guo, Qiang (author)
- Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China
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- Di, Dawei (author)
- Univ Cambridge, England
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- Zhang, Li (author)
- Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China
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- Yi, Chang (author)
- Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China
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- Gao, Feng (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- Friend, Richard H. (author)
- Univ Cambridge, England
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- Wang, Jianpu (author)
- Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China
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- Huang, Wei (author)
- Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China; Nanjing Univ Posts and Telecommun, Peoples R China; Nanjing Univ Posts and Telecommun, Peoples R China; Northwestern Polytech Univ, Peoples R China
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(creator_code:org_t)
- 2018-02-09
- 2018
- English.
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In: Nature Communications. - : NATURE PUBLISHING GROUP. - 2041-1723. ; 9
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https://www.nature.c...
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Abstract
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- Efficiency roll-off is a major issue for most types of light-emitting diodes (LEDs), and its origins remain controversial. Here we present investigations of the efficiency roll-off in perovskite LEDs based on two-dimensional layered perovskites. By simultaneously measuring electroluminescence and photoluminescence on a working device, supported by transient photoluminescence decay measurements, we conclude that the efficiency roll-off in perovskite LEDs is mainly due to luminescence quenching which is likely caused by non-radiative Auger recombination. This detrimental effect can be suppressed by increasing the width of quantum wells, which can be easily realized in the layered perovskites by tuning the ratio of large and small organic cations in the precursor solution. This approach leads to the realization of a perovskite LED with a record external quantum efficiency of 12.7%, and the efficiency remains to be high, at approximately 10%, under a high current density of 500 mA cm(-2).
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Zou, Wei
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Li, Renzhi
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Zhang, Shuting
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Liu, Yunlong
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Wang, Nana
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Cao, Yu
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Miao, Yanfeng
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Xu, Mengmeng
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Guo, Qiang
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Di, Dawei
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Zhang, Li
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Yi, Chang
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Gao, Feng
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Friend, Richard ...
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Wang, Jianpu
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Huang, Wei
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Other Physics To ...
- Articles in the publication
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Nature Communica ...
- By the university
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Linköping University