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A Multifunctional "...
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Zhang, JibinZhengzhou Univ, Peoples R China; Jinan Univ, Peoples R China
(författare)
A Multifunctional "Halide-Equivalent" Anion Enabling Efficient CsPb(Br/I)(3) Nanocrystals Pure-Red Light-Emitting Diodes with External Quantum Efficiency Exceeding 23%
- Artikel/kapitelEngelska2023
Förlag, utgivningsår, omfång ...
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2022-12-22
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WILEY-V C H VERLAG GMBH,2023
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Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:liu-191041
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https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-191041URI
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https://doi.org/10.1002/adma.202209002DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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Funding Agencies|Guangdong Basic and Applied Basic Research Foundation [2020A1515110527, 2020A1515110384]; National Natural Science Foundation of China [61774077, 62104083, 51625301, 91733302, 51861145301, 12074347, 61935009]; Key Projects of Joint Fund of Basic and Applied Basic Research Fund of Guangdong Province [2019B1515120073, 2019B090921002]; Research Fund of Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology [2020B1212030010]; Science Foundation for Distinguished Young Scholars of Henan Province [212300410019]
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Pure-red perovskite LEDs (PeLEDs) based on CsPb(Br/I)(3) nanocrystals (NCs) usually suffer from a compromise in emission efficiency and spectral stability on account of the surface halide vacancies-induced nonradiative recombination loss, halide phase segregation, and self-doping effect. Herein, a "halide-equivalent" anion of benzenesulfonate (BS-) is introduced into CsPb(Br/I)(3) NCs as multifunctional additive to simultaneously address the above challenging issues. Joint experiment-theory characterizations reveal that the BS- can not only passivate the uncoordinated Pb2+-related defects at the surface of NCs, but also increase the formation energy of halide vacancies. Moreover, because of the strong electron-withdrawing property of sulfonate group, electrons are expected to transfer from the CsPb(Br/I)(3) NC to BS- for reducing the self-doping effect and altering the n-type behavior of CsPb(Br/I)(3) NCs to near ambipolarity. Eventually, synergistic boost in device performance is achieved for pure-red PeLEDs with CIE coordinates of (0.70, 0.30) and a champion external quantum efficiency of 23.5%, which is one of the best value among the ever-reported red PeLEDs approaching to the Rec. 2020 red primary color. Moreover, the BS--modified PeLED exhibits negligible wavelength shift under different operating voltages. This strategy paves an efficient way for improving the efficiency and stability of pure-red PeLEDs.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Zhang, TiankaiLinköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten(Swepub:liu)tiazh64
(författare)
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Ma, ZhuangzhuangZhengzhou Univ, Peoples R China
(författare)
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Yuan, FanglongLinköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten,Beijing Normal Univ, Peoples R China(Swepub:liu)fanyu20
(författare)
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Zhou, XinJinan Univ, Peoples R China
(författare)
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Wang, Heyong,1989-Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten,Ist Italiano Tecnol, Italy(Swepub:liu)heywa58
(författare)
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Liu, ZheSouth China Univ Technol, Peoples R China
(författare)
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Qing, JianJinan Univ, Peoples R China
(författare)
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Chen, HongtingJinan Univ, Peoples R China
(författare)
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Li, XinjianZhengzhou Univ, Peoples R China
(författare)
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Su, ShijianSouth China Univ Technol, Peoples R China
(författare)
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Xie, JianingFoshan Univ, Peoples R China
(författare)
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Shi, ZhifengZhengzhou Univ, Peoples R China
(författare)
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Hou, LintaoJinan Univ, Peoples R China
(författare)
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Shan, ChongxinZhengzhou Univ, Peoples R China
(författare)
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Zhengzhou Univ, Peoples R China; Jinan Univ, Peoples R ChinaElektroniska och fotoniska material
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Advanced Materials: WILEY-V C H VERLAG GMBH35:80935-96481521-4095
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Zhang, Jibin
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Zhang, Tiankai
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Ma, Zhuangzhuang
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Yuan, Fanglong
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Zhou, Xin
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Wang, Heyong, 19 ...
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Liu, Zhe
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Qing, Jian
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Chen, Hongting
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Li, Xinjian
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Su, Shijian
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Xie, Jianing
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Shi, Zhifeng
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Hou, Lintao
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Shan, Chongxin
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