185112-61-2Relevant articles and documents
Synthesis of pyrimidine-cored host materials bearing phenylcarbazole for efficient yellow phosphorescent devices: Effect of linkage position
Jang, Hong-Gu,Song, Wook,Lee, Jun Yeob,Hwang, Seok-Ho
, p. 17030 - 17033 (2015)
Two isomeric host materials were synthesized and their photophysical properties and device performances were investigated. In particular, para-substituted pPDPC exhibited the most intense efficiency regardless of the low triplet energy compared to that of meta-substituted mPDPC. The EQE of the pPDPC device reached as high as 22.3% with a yellow color coordinate of (0.49, 0.50). This journal is
Efficient orange-red phosphorescent organic light-emitting diodes using an in situ synthesized copper(i) complex as the emitter
Wei, Feng,Qiu, Jacky,Liu, Xiaochen,Wang, Jianqiang,Wei, Huibo,Wang, Zhibin,Liu, Zhiwei,Bian, Zuqiang,Lu, Zhenghong,Zhao, Yongliang,Huang, Chunhui
, p. 6333 - 6341 (2014)
Inexpensive and eco-friendly luminescent Cu(i) complexes are ideal phosphorescent emitters for high efficiency organic light-emitting diodes (OLEDs). A series of pyrazinyl carbazole (CPz) compounds were designed and synthesized to obtain efficient luminescent Cu(i) complexes through reaction with CuI using a vacuum codeposition method. Based on photophysical studies of the CPz compounds and their codeposited CuI-CPz films, the compound 9-(3-(6-(carbazol-9-yl)pyrazin-2-yl)phenyl)-carbazole (CPzPC) with CuI was chosen as the emissive layer for OLED fabrication, where the emitter was identified as Cu2(μ-I)2(CPzPC)4 on the basis of X-ray absorption spectroscopy. After optimizing the device architecture and material selection including the CuI doping concentration and hole transporting layer, an efficient orange-red emitting OLED with a maximum emission band, an external quantum efficiency (EQE), and a luminance of 590 nm, 6.6% and 8619 cd m-2 (10 V), respectively, was achieved.
Method for synthesizing N-aryl carbazole compound by catalyzing reaction of carbazole with aryl hydrazine by using transition metal
-
Paragraph 0089-0092; 0101, (2020/12/14)
The invention relates to a method for synthesizing an N-aryl carbazole compound by catalyzing reaction of carbazole with aryl hydrazine through transition metal. According to the method, a transitionmetal salt is used as a catalyst, a carbazole compound and an aryl hydrazine compound are used as reaction substrates, the reaction substrates and an alkali compound are added into a solvent for a reaction for a certain period of time to obtain a reaction solution, and the reaction solution is separated and purified to obtain the N-aryl carbazole compound. According to the method, low-boiling-point acetonitrile is used as a reaction solvent, so post-reaction treatment is easy to carry out; oxygen in the air serves as an oxidizing agent, so reaction conditions are environmentally friendly and safe, cost is low, and excessive oxidation is avoided; an aryl hydrazine compound is used as an arylation reagent, and reaction byproducts only comprise water and nitrogen, so the method is environment-friendly and pollution-free; the transition metal salt is used as the catalyst, the activity of the transition metal salt is high, the use of equivalent noble metals is avoided, and synthesis cost isreduced; and generally speaking, the synthesis method is friendly to environment, simple in process, good in reaction selectivity and high in yield, and has a relatively strong industrial applicationprospect.
ORGANIC COMPOUND HAVING IMPROVED LUMINESCENT PROPERTIES, ORGANIC LIGHT EMITTING DIODE AND ORGANIC LIGHT EMITTING DEVICE HAVING THE COMPOUND
-
Paragraph 0224; 0225, (2020/07/16)
An organic compound, an organic light emitting diode including the compound, and an organic light emitting device including the organic light emitting diode are disclosed. The organic compound may include a fused hetero aromatic moiety having a p-type property and an aza-acridine moiety having an n-type property bonded to the fused hetero aromatic moiety via an aromatic or a hetero aromatic linker. The organic compound has relatively high energy level since it includes plural fused hetero aromatic rings. Holes and electrons can be recombined in an emitting material layer in a balanced manner since the organic compound has a bipolar property. The organic light emitting diode and the organic light emitting device including the organic compound have enhanced luminous efficiency and luminous lifetime.
