1060735-14-9Relevant articles and documents
Efficient blue/white phosphorescent organic light-emitting diodes based on a silicon-based host material via a direct carbon-nitrogen bond
Xie, Yue-Min,Cui, Lin-Song,Liu, Yuan,Zu, Feng-Shuo,Li, Qian,Jiang, Zuo-Quan,Liao, Liang-Sheng
, p. 5347 - 5353 (2015)
A new host material BCz-Si for blue and white phosphorescent organic light-emitting devices was designed and synthesized. The introduction of the triphenylsilyl moiety into the BCz unit can efficiently tune the HOMO/LUMO energy levels and maintain high triplet energy. Its carrier mobility, thermal, photophysical, and electrochemical properties were also systematically investigated. The high triplet energy of BCz-Si ensures efficient energy transfer from the host to the triplet emitter FIrpic. The blue device using BCz-Si as a host material achieved a maximum quantum efficiency of 21.0%, corresponding to a current efficiency and power efficiency as high as 46.5 cd A-1 and 45.8 lm W-1, respectively; meanwhile, high efficiency white phosphorescent OLEDs hosted by BCz-Si were also fabricated with a maximum external quantum efficiency of 24.6%, 70.5 cd A-1 for two-color based and 21.5%, 50.1 cd A-1 for three color based devices. This journal is
Blue thermally activated delayed fluorescent emitters having a bicarbazole donor moiety
Kim, Hyeong Min,Choi, Jeong Min,Lee, Jun Yeob
, p. 64133 - 64139 (2016)
Bis(4-(9′-phenyl-9H,9′H-[3,3′-bicarbazol]-9-yl)phenyl)methanone (BPBCz) and 9′,9′′′-((6-phenyl-1,3,5-triazine-2,4-diyl)bis(4,1-phenylene))bis(9-phenyl-9H,9′H-3,3′-bicarbazole) (TrzBCz) were investigated as thermally activated delayed fluorescent (TADF) emitters to exhibit blue emission color. A 3,3′-bicarbazole was a donor in the two TADF emitters, and benzophenone and triazine were acceptors of BPBCz and TrzBCz, respectively. Both BPBCz and TrzBCz behaved as high efficiency TADF emitters through a small singlet-triplet energy gap for the activation of delayed fluorescence. The BPBCz and TrzBCz TADF emitters offered high quantum efficiencies of 23.3% and 23.6% in the blue TADF devices.
Dendritic bipolar main body material taking triazine as central core, and preparation method and application of dendritic bipolar main body material in organic electroluminescent device
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Paragraph 0205; 0209, (2020/08/26)
The invention provides a compound with a structure represented by a formula (I) and a preparation method and application thereof. The compound with the structure represented by the formula (I) is a dendritic bipolar main body material taking triazine as a central core, the structure is different from a D-pi-A type structure of a traditional dendritic bipolar main body; the central core triazine isused as an electron acceptor (A), peripheral branches are used as electron donors (D), and a D-A type dendritic bipolar main body formed by direct connection of the donors and the acceptors maintainsa high triplet state energy level (2.8-3.3 eV), so that the application of the bipolar main body to a blue light OLED device is facilitated; it is found through experiments that the maximum current efficiency of a blue phosphorus photoluminescence device prepared with the compound as a main body material can reach 46.7 cd/A, the maximum power efficiency can reach 50.11 m/W, the maximum brightnesscan reach 32000 cd/m, and the turn-on voltage is 2.4 V.
Compound taking spirofluorene anthrone as core, preparation method and applications thereof
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Paragraph 0089; 0091-0092; 0096; 0109; 0111, (2020/03/09)
The invention relates to a compound taking spirofluorene anthrone as a core, a preparation method and applications thereof, wherein the structure of the compound is formed by linking spirofluorene anthrone to a five-membered ring fused ring structure, and the whole molecule is a large rigid structure and has a high triplet state energy level (T1). According to the invention, the compound is high in structural stereoscopicity, large in steric hindrance and not easy to rotate, so the chemical stability of the material is improved, and the compound has high glass transition temperature and high molecular thermal stability; the HOMO distribution position and the LUMO distribution position of the compound are separated from each other, so that the compound has appropriate HOMO and LUMO energy levels; and with the application of the compound in an OLED device, the light emitting efficiency and the service life of the device can be effectively improved.
Organic compound and application thereof, and organic electroluminescent device
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Paragraph 0112-0114, (2020/02/14)
The invention relates to the field of organic electroluminescent devices, and discloses an organic compound and an application thereof, and an organic electroluminescent device; the compound has a structure represented by a formula (I) or a formula (II). According to the organic compound provided by the invention, the HOMO energy level and LUMO energy level of the organic electroluminescent material can be regulated and controlled, and meanwhile, the organic electroluminescent material containing the organic compound has relatively high hole mobility rate and electron mobility rate, so that the luminous efficiency is improved.