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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201904114
|2 doi
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|a pubmed24n1005.xml
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|a (DE-627)NLM301738904
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|a (NLM)31566271
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
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|a Wang, Miaosheng
|e verfasserin
|4 aut
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| 245 |
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|a Revealing the Cooperative Relationship between Spin, Energy, and Polarization Parameters toward Developing High-Efficiency Exciplex Light-Emitting Diodes
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|c 2019
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|a Text
|b txt
|2 rdacontent
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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 Completed 13.11.2019
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|a Date Revised 01.10.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Experimental studies to reveal the cooperative relationship between spin, energy, and polarization through intermolecular charge-transfer dipoles to harvest nonradiative triplets into radiative singlets in exciplex light-emitting diodes are reported. Magneto-photoluminescence studies reveal that the triplet-to-singlet conversion in exciplexes involves an artificially generated spin-orbital coupling (SOC). The photoinduced electron parametric resonance measurements indicate that the intermolecular charge-transfer occurs with forming electric dipoles (D+• →A-• ), providing the ionic polarization to generate SOC in exciplexes. By having different singlet-triplet energy differences (ΔEST ) in 9,9'-diphenyl-9H,9'H-3,3'-bicarbazole (BCzPh):3',3'″,3'″″-(1,3,5-triazine-2,4,6-triyl)tris(([1,1'-biphenyl]-3-carbonitrile)) (CN-T2T) (ΔEST = 30 meV) and BCzPh:bis-4,6-(3,5-di-3-pyridylphenyl)-2-methyl-pyrimidine (B3PYMPM) (ΔEST = 130 meV) exciplexes, the SOC generated by the intermolecular charge-transfer states shows large and small values (reflected by different internal magnetic parameters: 274 vs 17 mT) with high and low external quantum efficiency maximum, EQEmax (21.05% vs 4.89%), respectively. To further explore the cooperative relationship of spin, energy, and polarization parameters, different photoluminescence wavelengths are selected to concurrently change SOC, ΔEST , and polarization while monitoring delayed fluorescence. When the electron clouds become more deformed at a longer emitting wavelength due to reduced dipole (D+• →A-• ) size, enhanced SOC, increased orbital polarization, and decreased ΔEST can simultaneously occur to cooperatively operate the triplet-to-singlet conversion
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|a Journal Article
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|a charge-transfer states
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|a delayed fluorescence
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|a exciplexes
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|a orbital polarization
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|a spin-orbital coupling
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| 700 |
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|a Huang, Yi-Hsuan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lin, Kai-Siang
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yeh, Tzu-Hung
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Duan, Jiashun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ko, Tzu-Yu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Shun-Wei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wong, Ken-Tsung
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hu, Bin
|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 31(2019), 46 vom: 01. Nov., Seite e1904114
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:31
|g year:2019
|g number:46
|g day:01
|g month:11
|g pages:e1904114
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|u http://dx.doi.org/10.1002/adma.201904114
|3 Volltext
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