CYCLIC PHOSPHAZENE COMPOUNDS AND USE THEREOF IN ORGANIC LIGHT EMITTING DIODES
申请人:Fuchs Evelyn
公开号:US20110172423A1
公开(公告)日:2011-07-14
An organic light-emitting diode comprising at least one cyclic phosphazene compound, a light-emitting layer formed from at least one matrix material and at least one emitter material, wherein the at least one matrix material comprises at least one cyclic phosphazene compound, the use of cyclic phosphazene compounds in organic light-emitting diodes and a device selected from the group consisting of stationary visual display units, mobile visual display units and illumination units comprising at least one inventive organic light-emitting diode, and selected cyclic phosphazene compounds and processes for preparing them.
We present a series of low-molecular-weight materials based on cyclic phosphazenes for the use as hostmaterials in bluephosphorescentorganiclight-emittingdiodes. Substituted phenyl rings are attached to the central phosphazene ring either via phosphorus–oxygen bonds to yield phenoxy-substituted derivatives or via direct phosphorus–carbon bonds to yield phenyl-substituted derivatives. The phenoxy
我们提出了一系列基于环状磷腈的低分子量材料,用作蓝色磷光有机发光二极管的主体材料。取代的苯环通过磷-氧键连接至中央磷腈环,以生成苯氧基取代的衍生物,或通过直接的磷-碳键连接以生成苯基取代的衍生物。苯氧基取代的环磷腈是通过苯氧基将六氯环三磷腈中的六个氯原子进行亲核取代而制备的,而苯基取代的环磷腈是在三当量取代的次膦酰胺的环缩合反应中形成的。与苯氧基取代相比,苯基取代导致材料具有更好的热性能。由于与磷腈核的非共轭键合,主体材料的三重态能量非常高,超过3 eV。在使用一种化合物作为主体的饱和蓝色磷光发射体Ir(dbfmi)的OLED器件中,峰值功率效率为7.6 lm W达到–1和5000 cd m –2的峰值亮度。
ORGANIC ELECTROLUMINESCENCE DEVICE AND ORGANOMETALLIC COMPLEX FOR ORGANIC ELECTROLUMINESCENCE DEVICE
申请人:Samsung Display Co., Ltd.
公开号:US20210036243A1
公开(公告)日:2021-02-04
Provided is an organic electroluminescence device. The organic electroluminescence device according to an embodiment includes a first electrode, a second electrode facing the first electrode, and a plurality of organic layers between the first electrode and the second electrode, wherein at least one of the plurality of organic layers includes an organometallic complex including a metal atom which is a central atom, a plurality of ligand connected to the metal atom, and a nitrogen atom connecting two of the plurality of ligands. The nitrogen atom includes an aromatic ring group as a substituent. The aromatic ring group is not bonded to any of the plurality of ligands to form a ring, thereby allowing the organic electroluminescent device to exhibit a low drive voltage and improved life time.
ORGANIC ELECTROLUMINESCENCE DEVICE AND HETEROCYCLIC COMPOUND FOR ORGANIC ELECTROLUMINESCENCE DEVICE
申请人:Samsung Display Co., Ltd.
公开号:US20190252626A1
公开(公告)日:2019-08-15
An organic electroluminescence device includes a first electrode, a hole transport region disposed on the first electrode, a light emitting layer disposed on the hole transport region, an electron transport region disposed on the light emitting layer, and a second electrode disposed on the electron transport region. The light emitting layer includes a heterocyclic compound represented by Formula 1 below. In Formula 1, D
1
and D
2
are each independently represented by Formula 2 below, and A is represented by any one of Formulas 3-1 to 3-3 below.
D
1
-A-D
2
Formula 1