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240405s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202401724
|2 doi
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|a pubmed24n1453.xml
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|a (DE-627)NLM370645723
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|a (NLM)38575151
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|a DE-627
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|a eng
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|a Wu, Shao-Jie
|e verfasserin
|4 aut
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|a Thermally Activated Delayed Fluorescence with Nanosecond Emission Lifetimes and Minor Concentration Quenching
|b Achieving High-Performance Nondoped and Doped Blue OLEDs
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|c 2024
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|a Text
|b txt
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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 26.06.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2024 Wiley‐VCH GmbH.
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|a Simultaneously achieving a high photoluminescence quantum yield (PLQY), ultrashort exciton lifetime, and suppressed concentration quenching in thermally activated delayed fluorescence (TADF) materials is desirable yet challenging. Here, a novel acceptor-donor-acceptor type TADF emitter, namely, 2BO-sQA, wherein two oxygen-bridged triarylboron (BO) acceptors are arranged with cofacial alignment and positioned nearly orthogonal to the rigid dispirofluorene-quinolinoacridine (sQA) donor is reported. This molecular design enables the compound to achieve highly efficient (PLQYs up to 99%) and short-lived (nanosecond-scale) blue TADF with effectively suppressed concentration quenching in films. Consequently, the doped organic light-emitting diodes (OLEDs) base on 2BO-sQA achieve exceptional electroluminescence performance across a broad range of doping concentrations, maintaining maximum external quantum efficiencies (EQEs) at over 30% for doping concentrations ranging from 10 to 70 wt%. Remarkably, the nondoped blue OLED achieves a record-high maximum EQE of 26.6% with a small efficiency roll-off of 14.0% at 1000 candelas per square meter. By using 2BO-sQA as the sensitizer for the multiresonance TADF emitter ν-DABNA, TADF-sensitized fluorescence OLEDs achieve high-efficiency deep-blue emission. These results demonstrate the feasibility of this molecular design in developing TADF emitters with high efficiency, ultrashort exciton lifetime, and minimal concentration quenching
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|a Journal Article
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|a blue emission
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|a concentration quenching
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|a emission lifetime
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|a organic light‐emitting diodes
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|a thermally activated delayed fluorescence
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| 700 |
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|a Fu, Xi-Feng
|e verfasserin
|4 aut
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| 700 |
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|a Zhang, Dong-Hai
|e verfasserin
|4 aut
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| 700 |
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|a Sun, Yu-Fu
|e verfasserin
|4 aut
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|a Lu, Xin
|e verfasserin
|4 aut
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|a Lin, Fu-Lin
|e verfasserin
|4 aut
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|a Meng, Lingyi
|e verfasserin
|4 aut
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|a Chen, Xu-Lin
|e verfasserin
|4 aut
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| 700 |
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|a Lu, Can-Zhong
|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 36(2024), 26 vom: 01. Juni, Seite e2401724
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:36
|g year:2024
|g number:26
|g day:01
|g month:06
|g pages:e2401724
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|u http://dx.doi.org/10.1002/adma.202401724
|3 Volltext
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