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|a 10.1002/adma.202408816
|2 doi
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|a pubmed24n1593.xml
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|a eng
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|a Fan, Tianjiao
|e verfasserin
|4 aut
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|a Enhancing Spin-Orbit Coupling in an Indolocarbazole Multiresonance Emitter by a Sulfur-Containing Peripheral Substituent for a Fast Reverse Intersystem Crossing
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|c 2024
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|a Text
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 07.11.2024
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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 A fast reverse intersystem crossing (RISC) remains an ongoing pursuit for multiresonance (MR) emitters but faces formidable challenges, particularly for indolocarbazole (ICz) derived ones. Here, heavy-atom effect is introduced first to construct ICz-MR emitter using a sulfur-containing substitute, simultaneously enhancing both spin-orbit and spin-vibronic coupling to afford a fast RISC with a rate of 1.2 × 105 s-1, nearly one order of magnitude higher than previous maximum values. The emitter also exhibits an extremely narrow deep-blue emission peaking at 456 nm with full-width at half-maxima of merely 12 nm and a photoluminescence quantum yield of 92%. Benefiting from its efficient triplet upconversion capability, this emitter achieves not only a high maximum external quantum efficiency (EQE) of 31.1% in organic light-emitting diodes but also greatly alleviates efficiency roll-off, affording record-high EQEs of 29.9% at 1000 cd m-2 and 18.7% at 5000 cd m-2 among devices with ICz-MR emitters
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|a Journal Article
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|a indolocarbazole
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|a multiresonance
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|a organic light emitting diode
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|a spin–orbit coupling
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|a spin–vibronic coupling
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1 |
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|a Liu, Qiwei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhang, Hai
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Xuewen
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhang, Dongdong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Duan, Lian
|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 36(2024), 45 vom: 16. Nov., Seite e2408816
|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:45
|g day:16
|g month:11
|g pages:e2408816
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|u http://dx.doi.org/10.1002/adma.202408816
|3 Volltext
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