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231226s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202310417
|2 doi
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|a pubmed24n1256.xml
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|a (DE-627)NLM36463250X
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|a (NLM)37971674
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|a DE-627
|b ger
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|a eng
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|a He, Xin
|e verfasserin
|4 aut
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|a Rational Medium-Range Charge Transfer Strategy Toward Highly Efficient Violet-Blue Organic Light-Emitting Diodes with Narrowed Emission
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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 11.01.2024
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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 The spectral narrowing engineering of pure-organic emitters attracts great research interests in realizing high color purity. Here, the adjusted medium-range charge transfer (MCT) strategy of TIC-BO with rigid planar structure by fusing two typical UV-emitting multiple resonance (MR) fragments via the ingenious double-halide cyclized coupling reaction is reported. The resulting TIC-BO with MCT nature shows efficient violet-blue emission in dilute toluene and evaporated host-guest films, and desirably narrowed spectra are achieved by the suppression of structural relaxation and the shortened charge transfer states. The single-doped device with TIC-BO as emitter shows narrowed violet-blue electroluminescence peaked at 428 nm with full-width at half-maximum of 43 nm (0.28 eV), and the Commission Internationale de l'Éclairage coordinates of (0.160, 0.050). A maximum external quantum efficiency (EQEmax ) of 20.50% is achieved, which is among the best results of the corresponding violet-blue emitting region. Further introduction of a stronger electron-donating carbazole group makes TIC-BNO exhibit red-shifted sky-blue emission with MR-dominant properties, and good device performance is received with EQEmax of 34.58%. The outstanding performances of TIC-BO successfully demonstrate the significance and prospect of the proposed molecular design strategy
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|a Journal Article
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|a DHCC reaction
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|a MCT state
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|a MR-TADF
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|a indolo(3,2,1-jk)carbazole
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|a narrowband emission
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|a organic light-emitting diodes
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|a violet-blue emitters
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|a Lou, Jingli
|e verfasserin
|4 aut
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|a Li, Baoxi
|e verfasserin
|4 aut
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|a Dong, Xiaobin
|e verfasserin
|4 aut
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|a Zhong, Feiyang
|e verfasserin
|4 aut
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| 700 |
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|a Liu, Wei
|e verfasserin
|4 aut
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1 |
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|a Feng, Xing
|e verfasserin
|4 aut
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|a Yang, Dezhi
|e verfasserin
|4 aut
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|a Ma, Dongge
|e verfasserin
|4 aut
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|a Zhao, Zujin
|e verfasserin
|4 aut
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|a Wang, Zhiming
|e verfasserin
|4 aut
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|a Tang, Ben 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), 2 vom: 09. Jan., Seite e2310417
|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:2
|g day:09
|g month:01
|g pages:e2310417
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|u http://dx.doi.org/10.1002/adma.202310417
|3 Volltext
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