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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202102246
|2 doi
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|a pubmed24n1097.xml
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|a (NLM)34396606
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
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|a Guo, Zhenyu
|e verfasserin
|4 aut
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|a Promoting Energy Transfer via Manipulation of Crystallization Kinetics of Quasi-2D Perovskites for Efficient Green Light-Emitting Diodes
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 06.10.2021
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2021 Wiley-VCH GmbH.
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|a Quasi-2D (Q-2D) perovskites are promising materials applied in light-emitting diodes (LEDs) due to their high exciton binding energy and quantum confinement effects. However, Q-2D perovskites feature a multiphase structure with abundant grain boundaries and interfaces, leading to nonradiative loss during the energy-transfer process. Here, a more efficient energy transfer in Q-2D perovskites is achieved by manipulating the crystallization kinetics of different-n phases. A series of alkali-metal bromides is utilized to manipulate the nucleation and growth of Q-2D perovskites, which is likely associated with the Coulomb interaction between alkali-metal ions and the negatively charged PbBr6 4- frames. The incorporation of K+ is found to restrict the nucleation of high-n phases and allows the subsequent growth of low-n phases, contributing to a spatially more homogeneous distribution of different-n phases and promoted energy transfer. As a result, highly efficient green Q-2D perovskites LEDs with a champion EQE of 18.15% and a maximum brightness of 25 800 cd m-2 are achieved. The findings affirm a novel method to optimize the performance of Q-2D perovskite LEDs
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|a Journal Article
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|a alkali-metal cations
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|a crystallization kinetics
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|a perovskite light-emitting diodes
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|a quasi-2D perovskites
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|a Zhang, Yu
|e verfasserin
|4 aut
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|a Wang, Bingzhe
|e verfasserin
|4 aut
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|a Wang, Liding
|e verfasserin
|4 aut
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|a Zhou, Ning
|e verfasserin
|4 aut
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|a Qiu, Zhiwen
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|a Li, Nengxu
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|a Chen, Yihua
|e verfasserin
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|a Zhu, Cheng
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|4 aut
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|a Xie, Haipeng
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|a Song, Tinglu
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|a Song, Lei
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|a Xue, Haibo
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|a Tao, Shuxia
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|a Chen, Qi
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|a Xing, Guichuan
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|a Xiao, Lixin
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|a Liu, Zhiwei
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|a Zhou, Huanping
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 33(2021), 40 vom: 21. Okt., Seite e2102246
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:33
|g year:2021
|g number:40
|g day:21
|g month:10
|g pages:e2102246
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|u http://dx.doi.org/10.1002/adma.202102246
|3 Volltext
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