1260032-04-9Relevant articles and documents
Dibenzothiophene-indolocarbazole-based bipolar material: Host for green phosphorescent OLEDs and non-doped fluorescent emitter
Braveenth, Ramanaskanda,Bae, Il-Ji,Raagulan, Kanthasamy,Kim, Sohyeon,Kim, Sunghoon,Kim, Miyoung,Chai, Kyu Yun
, p. 466 - 474 (2019)
Novel bipolar material 2-(5-phenylindolo[3,2-a]carbazol-12(5H)-yl)dibenzothiophene 5,5-dioxide (DBTO-IN/CAR) was designed and synthesized with a high yield of 64%. The synthesized material exhibited an excellent glass transition temperature of 156 °C, which manifests as a high thermal stability of DBTO-IN/CAR. We fabricated two different devices, namely a green phosphorescent OLED and a non-doped bipolar fluorescent emitter, with DBTO-IN/CAR as the bipolar material. The DBTO-IN/CAR host material based device exhibited excellent maximum power and current efficiencies of 45.36 lm/W and 51.98 cd/A, respectively. The efficiencies are higher than that of the reference CBP-based similar device, which exhibited a power efficiency of 42.01 lm/W. The DBTO-IN/CAR-based green phosphorescent device revealed a good external quantum efficiency of 19.03%. Moreover, the non-doped DBTO-IN/CAR fluorescent emitter related device also exhibited better current and external quantum efficiencies of 4.30 cd/A and 2.47%, respectively, with the emission of cyan color.
Functional material based on stable chemical structure
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Paragraph 0291; 0298; 0300, (2021/08/25)
The invention relates to functional materials based on stable chemical structures. A series of novel donor - acceptor type TADF activated emitters have been designed, which are intended to develop stable OLED. with enhanced operational stability and improved color purity that can be used in full color displays and lighting applications.
Deuterated organic compounds for organic light-emitting diode and organic light-emitting diode including the same
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Paragraph 0900-0905, (2020/12/15)
The present invention relates to an organic electroluminescent compound represented by chemical formula A and an organic light emitting device comprising the same. Substituents Y, Ar2 , L3 , K, p and x are as defined in the description of the invention. [Chemical A] (by machine translation)