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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202211858
|2 doi
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|a pubmed24n1179.xml
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|a (DE-627)NLM353994685
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|a (NLM)36893767
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Lou, Qing
|e verfasserin
|4 aut
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|a Thermally Enhanced and Long Lifetime Red TADF Carbon Dots via Multi-Confinement and Phosphorescence Assisted Energy Transfer
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|c 2023
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 18.05.2023
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|a Date Revised 18.05.2023
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 Wiley-VCH GmbH.
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|a Thermally activated delayed fluorescence (TADF) materials, which can harvest both singlet and triplet excitons for high-efficiency emission, have attracted widespread concern for their enormous applications. Nevertheless, luminescence thermal quenching severely limits the efficiency and operating stability in TADF materials and devices at high temperature. Herein, a surface engineering strategy is adopted to obtain unique carbon dots (CDs)-based thermally enhanced TADF materials with ≈250% enhancement from 273 to 343 K via incorporating seed CDs into ionic crystal network. The rigid crystal network can simultaneously boost reverse intersystem crossing process via enhancing spin-orbit coupling between singlet and triplet states and suppressing non-radiative transition rate, contributing to the thermally enhanced TADF character. Benefiting from efficient energy transfer from triplet states of phosphorescence center to singlet states of CDs, TADF emission at ≈600 nm in CDs displays a long lifetime up to 109.6 ms, outperforming other red organic TADF materials. Thanks to variable decay rates of the delayed emission centers, time and temperature-dependent delayed emission color has been first realized in CDs-based delayed emission materials. The CDs with thermally enhanced and time-/temperature-dependent emission in one material system can offer new opportunities in information protection and processing
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|a Journal Article
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|a TADF
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|a carbon dot
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|a energy transfer
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|a thermally enhanced luminescence
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|a time-/temperature-dependent delayed emission
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|a Chen, Niu
|e verfasserin
|4 aut
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|a Zhu, Jinyang
|e verfasserin
|4 aut
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|a Liu, Kaikai
|e verfasserin
|4 aut
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1 |
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|a Li, Chao
|e verfasserin
|4 aut
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|a Zhu, Yongsheng
|e verfasserin
|4 aut
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|a Xu, Wen
|e verfasserin
|4 aut
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| 700 |
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|a Chen, Xu
|e verfasserin
|4 aut
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| 700 |
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|a Song, Zhijiang
|e verfasserin
|4 aut
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| 700 |
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|a Liang, Changhao
|e verfasserin
|4 aut
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| 700 |
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|a Shan, Chong-Xin
|e verfasserin
|4 aut
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| 700 |
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|a Hu, Junhua
|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 35(2023), 20 vom: 24. Mai, Seite e2211858
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:35
|g year:2023
|g number:20
|g day:24
|g month:05
|g pages:e2211858
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|u http://dx.doi.org/10.1002/adma.202211858
|3 Volltext
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