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240411s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202313602
|2 doi
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|a pubmed24n1488.xml
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|a DE-627
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|a eng
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|a An, Rui-Zhi
|e verfasserin
|4 aut
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|a Excited-State Engineering Enables Efficient Deep-Blue Light-Emitting Diodes Exhibiting BT.2020 Color Gamut
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|c 2024
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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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|2 rdacarrier
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|a Date Revised 01.08.2024
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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 Organic luminescent materials that exhibit thermally activated delayed fluorescence (TADF) can convert non-emissive triplet excitons into emissive singlet states through a reverse intersystem crossing (RISC) process. Therefore, they have tremendous potential for applications in organic light-emitting diodes (OLEDs). However, with the development of ultra-high definition 4K/8K display technologies, designing efficient deep-blue TADF materials to achieve the Commission Internationale de l'Éclairage (CIE) coordinates fulfilling BT.2020 remains a significant challenge. Here, an effective approach is proposed to design deep-blue TADF molecules based on hybrid long- and short-range charge-transfer by incorporation of multiple donor moieties into organoboron multiple resonance acceptors. The resulting TADF molecule exhibits deep-blue emission at 414 nm with a full width at half maximum (FWHM) of 29 nm, together with a thousand-fold increase in RISC rate. OLEDs based on the champion material achieve a record maximum external quantum efficiency (EQE) of 22.8% with CIE coordinates of (0.163, 0.046), approaching the coordinates of the BT.2020 blue standard. Moreover, TADF-assisted fluorescence devices employing the designed material as a sensitizer exhibit an exceptional EQE of 33.1%. This work thus provides a blueprint for future development of efficient deep-blue TADF emitters, representing an important milestone towards meeting the blue color gamut standard of BT.2020
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|a Journal Article
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|a bt.2020
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|a deep‐blue emission
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|a hybrid long‐/ short‐range charge‐transfer
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|a organic light‐emitting diodes
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| 650 |
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4 |
|a thermally activated delayed fluorescence
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| 700 |
1 |
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|a Sun, Yuqi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chen, Hao-Yang
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Yuan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Privitera, Alberto
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Myers, William K
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ronson, Tanya K
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Gillett, Alexander J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Greenham, Neil C
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cui, Lin-Song
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 31 vom: 31. Aug., Seite e2313602
|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:31
|g day:31
|g month:08
|g pages:e2313602
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|u http://dx.doi.org/10.1002/adma.202313602
|3 Volltext
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