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Transport Layer Eng...
Transport Layer Engineering Toward Lower Threshold for Perovskite Lasers
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- Zhang, Jia (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten,Univ Tennessee, TN 37996 USA
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- Qin, Jiajun (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Cai, Weidong (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Tang, Yipeng (author)
- Univ Tennessee, TN 37996 USA
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- Zhang, Huotian (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten,Imperial Coll London, England
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- Wang, Tong (author)
- Imperial Coll London, England
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- Bakulin, Artem (author)
- Imperial Coll London, England
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- Hu, Bin (author)
- Univ Tennessee, TN 37996 USA
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- Liu, Xiaoke (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Gao, Feng (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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(creator_code:org_t)
- WILEY-V C H VERLAG GMBH, 2023
- 2023
- English.
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In: Advanced Materials. - : WILEY-V C H VERLAG GMBH. - 0935-9648 .- 1521-4095. ; 35:30
- Related links:
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https://liu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Charge-transport layers are essential for achieving electrically pumped perovskite lasers. However, their role in perovskite lasing is not fully understood. Here, the role of charge-transport layers on the lasing actions of perovskite films is explored by investigating the amplified spontaneous emission (ASE) thresholds. A largely reduced ASE threshold and enhanced ASE intensity is demonstrated by introducing an additional hole transport layer poly(triaryl amine) (PTAA). It is shown that the key role of the PTAA layer is to accelerate the hot-carrier cooling process by extracting holes in perovskites. With reduced hot holes, the Auger recombination loss is largely suppressed, resulting in decreased ASE threshold. This argument is further supported by the fact that the ASE threshold can be further reduced from 25.7 to 7.2 mu J cm(-2) upon switching the pumping wavelength from 400 to 500 nm to directly avoid excess hot-hole generation. This work exemplifies how to further reduce the ASE threshold with transport layer engineering through hot-hole manipulation. This is critical to maintaining the excellent gain properties of perovskites when integrating them into electrical devices, paving the way for electrically pumped perovskite lasers.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- ASE threshold; hole extraction; hot-carrier cooling; optical gain; transport layer engineering
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Zhang, Jia
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Qin, Jiajun
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Cai, Weidong
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Tang, Yipeng
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Zhang, Huotian
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Wang, Tong
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show more...
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Bakulin, Artem
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Hu, Bin
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Liu, Xiaoke
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Gao, Feng
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show less...
- 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 Condensed Matter ...
- Articles in the publication
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Advanced Materia ...
- By the university
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Linköping University