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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202212237
|2 doi
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|a pubmed25n1179.xml
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|a eng
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|a Liu, Hao
|e verfasserin
|4 aut
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|a Energy-Efficient Stable Hyperfluorescence Organic Light-Emitting Diodes with Improved Color Purities and Ultrahigh Power Efficiencies Based on Low-Polar Sensitizing Systems
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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
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|a Date Completed 01.06.2023
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|a Date Revised 01.06.2023
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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 Multi-resonance (MR) molecules with thermally activated delayed fluorescence (TADF) are emerging as promising candidates for high-definition displays because of their narrow emission spectra. However, the electroluminescence (EL) efficiencies and spectra of MR-TADF molecules are highly sensitive to hosts and sensitizers when applied to organic light-emitting diodes (OLEDs), and the highly polar environments in devices often lead to significantly broadened EL spectra. In this study, a proof-of-concept TADF sensitizer (BTDMAC-XT) with low polarity, high steric hindrance, and concentration-quenching free feature is constructed, which acts as a good emitter in doped and non-doped OLEDs with high external quantum efficiencies (ηext s) of 26.7% and 29.3%, respectively. By combining BTDMAC-XT with conventional low-polarity hosts, low-polarity sensitizing systems with a small carrier injection barrier and full exciton utilization are constructed for the MR-TADF molecule BN2. Hyperfluorescence (HF) OLEDs employing the low-polar sensitizing systems successfully improve the color quality of BN2 and afford an excellent ηext of 34.4%, a record-high power efficiency of 166.3 lm W-1 and a long operational lifetime (LT50 = 40309 h) at an initial luminance of 100 cd m-2 . These results provide instructive guidance for the sensitizer design and device optimization for energy-efficient and stable HF-OLEDs with high-quality light
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|a Journal Article
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|a hyperfluorescence
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|a low-polar sensitizing systems
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|a multi-resonance
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|a organic light-emitting diodes
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|a thermally activated delayed fluorescence
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| 700 |
1 |
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|a Fu, Yan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chen, Jinke
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Tang, Ben Zhong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhao, Zujin
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 35(2023), 22 vom: 24. Juni, Seite e2212237
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnas
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| 773 |
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|g volume:35
|g year:2023
|g number:22
|g day:24
|g month:06
|g pages:e2212237
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| 856 |
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|u http://dx.doi.org/10.1002/adma.202212237
|3 Volltext
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