Tailoring electronic structure of organic host for high-performance phosphorescent organic light-emitting diodes
摘要:
We investigated highly efficient phosphorescent organic light-emitting diodes (PHOLEDs) based on three novel 1,3,5-triazine derivatives as the host materials and two kinds of iridium complexes as the guests, respectively. For comparison, the devices using a common phosphorescent host 4,4'-N,N'-dicarbazolebiphenyl (CBP) have also been fabricated. Results show that the devices using 9-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-9H-carbazole (PTC) and 4-(4,6-diphenoxy-1,3,5-triazin-2-yl)-N,N-diphenylaniline (POTA) as host have better performance than that of CBP. In comparison with the PHOLEDs based on CBP host, PTC- and POTA-based PHOLEDs show significantly lower driving voltages and higher power efficiencies. The high bipolar carrier mobility of the host is found to be critical to this kind of doping system, which would balance the injection of both carriers and improve efficiency. (C) 2014 Elsevier B.V. All rights reserved.
Carbazole–triazine based donor–acceptor porous organic frameworks for efficient visible-light photocatalytic aerobic oxidation reactions
作者:Jian Luo、Jingzhi Lu、Jian Zhang
DOI:10.1039/c8ta05329d
日期:——
synthesis of a series of carbazole–triazine based donor–acceptor (D–A) POFs and their photocatalytic activities for aerobicoxidation reactions. The simultaneous introduction of a carbazole-based electron donor and a triazine-based electron acceptor in D–A POFs stabilizes the charge transfer state and enables an efficient triplet–triplet energy transfer to generate 1O2. Meanwhile, systematic variation of
我们报告了一系列基于咔唑-三嗪的供体-受体(DA)POF的合成及其对需氧氧化反应的光催化活性。在D–A POF中同时引入咔唑基电子供体和三嗪基电子受体可稳定电荷转移状态,并能有效地进行三重态-三重态能量转移,从而产生1 O 2。同时,D–A距离的系统变化导致可调节的光氧化还原特性,因此产生了活性氧(ROSs)的效率。在可见光激发下,所有三种D–A POF均具有出色的促进三种需氧氧化的能力:硫化物氧化,氧化胺偶联和曼尼希反应。这项系统的研究验证了D–A POF作为高性能光氧化催化剂的设计原理,该催化剂具有广泛的底物范围以及出色的稳定性和可回收性。
MATERIAL FOR ORGANIC ELECTROLUMINESCENCE DEVICE AND ORGANIC ELECTROLUMINESCENCE DEVICE UTILIZING THE SAME
申请人:Iwakuma Toshihiro
公开号:US20090017330A1
公开(公告)日:2009-01-15
A material for organic electroluminescence devices of the invention which is for use in combination with at least one phosphorescent metal complex has a specific heterocyclic structure. The material for organic electroluminescence devices is used as a host material or a hole transporting material. An organic electroluminescence device having an anode, a cathode and an organic thin film layer having one or more layers which is interposed between the anode and cathode, in which at least one layer of the organic thin film layer contains the material for organic electroluminescence devices, has a high emitting efficiency, causes little pixel defects, is excellent in heat resistance, and shows a long lifetime.
MATERIAL FOR ORGANIC ELECTROLUMINESCENCE DEVICES AND ORGANIC ELECTROLUMINESCENCE DEVICE USING THE MATERIAL
申请人:IWAKUMA Toshihiro
公开号:US20120319099A1
公开(公告)日:2012-12-20
A material for organic electroluminescence devices comprising a compound in which a heterocyclic group having nitrogen is bonded to an arylcarbazolyl group or a carbazolylalkylene group and an organic electroluminescence device comprising an anode, a cathode and an organic thin film layer comprising at least one layer and disposed between the anode and the cathode, wherein at least one layer in the organic thin film layer comprises the material for organic electroluminescence devices described above. The material can provide an organic electro-luminescence device emitting bluish light with a high purity of color. The organic electroluminescence device uses the material.
METAL-COMPLEX COMPOUND AND ORGANIC ELECTROLUMINESCENCE DEVICE USING THE COMPOUND
申请人:WATANABE Masami
公开号:US20070108891A1
公开(公告)日:2007-05-17
A metal complex compound having a specific structure having a metal such as iridium, and an organic electroluminescence device which has an organic thin film layer having one layer or a plurality of layers including at least a light emitting layer and disposed between a pair of electrodes and contains the metal complex in at least one layer in the organic thin film layer. The organic electroluminescence device exhibits a great efficiency of light emission and has a long life due to the metal complex compound.
BISCARBAZOLE DERIVATIVE HOST MATERIALS AND RED EMITTER FOR OLED EMISSIVE REGION
申请人:Yamamoto Hitoshi
公开号:US20150194622A1
公开(公告)日:2015-07-09
The organic electroluminescence device utilizes a novel combination of a biscarbazole derivative compound as a phospherescent host materials and an orgaphosphorescent material as a red phosphorescent dopant material in the light emitting region of the device, where the biscarbazole derivative compound is represented by a formula (1); wherein the red phosphorescent dopant material is a phosphorescent organometallic complex having a substituted chemical structure represented by one of the partial chemical structures represented by a formulas (D1), (D2) and (D3).