Provided is an organic electroluminescent device having high efficiency and high driving stability while being driven at a low voltage. The organic electroluminescent device is an organic electroluminescent device including a light-emitting layer between an anode and a cathode opposite to each other, in which: the light-emitting layer contains two kinds of host materials and a light-emitting dopant; and a first host material (H1) out of the two kinds of host materials is an indolocarbazole-based compound having one or two indolocarbazole rings, and a second host material (H2) out of the materials is a host material selected from carbazole-based compounds each represented by the general formula (3), the compounds each having a structure in which two carbazole rings are bonded through a six-membered aromatic ring.
Provided is a practically useful organic electroluminescent device (organic EL device) having high efficiency and high driving stability while being capable of being driven at a low voltage. The organic electroluminescent device includes a light-emitting layer between an anode and a cathode opposite to each other. The light-emitting layer contains two host materials and at least one light-emitting dopant. One of the two host materials is a host material selected from an indolocarbazole compound having one indolocarbazole ring and an indolocarbazole compound having two indolocarbazole rings, and the other thereof is a host material selected from carbazole compounds.
本文提供了一种实际有用的有机电致发光器件(有机 EL 器件),它具有高效率和高驱动稳定性,同时能够在低电压下驱动。该有机电致发光器件包括一个位于阳极和阴极之间的发光层,阳极和阴极相对。发光层包含两种主材料和至少一种发光掺杂剂。两种宿主材料中的一种是选自具有一个吲哚咔唑环的吲哚咔唑化合物和具有两个吲哚咔唑环的吲哚咔唑化合物的宿主材料,另一种是选自咔唑化合物的宿主材料。
Organic electroluminescent device
申请人:NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.
公开号:US10361378B2
公开(公告)日:2019-07-23
Provided is a practically useful organic EL element having high efficiency and high driving stability while being capable of being driven at a low voltage. The organic EL element has a light-emitting layer and any other organic layer between an anode and a cathode opposite to each other. The light-emitting layer contains at least two host materials and at least one light-emitting dopant. At least one of the host materials is a host material selected from compounds each having one or two indolocarbazole skeletons, and at least one of the other host materials is a host material selected from carbazole compounds each substituted with a dibenzofuran or a dibenzothiophene.
An object of the present invention is to provide an organic electroluminescence device having excellent light emission efficiency and durability, in particular, durability when driving at a high temperature. Provided is an organic electroluminescence device including on a substrate a pair of electrodes, and at least one layer of an organic layer including a light emitting layer containing a light emitting material disposed between the electrodes, wherein the light emitting layer includes at least each one of specific indolocarbazole derivatives and specific condensed ring metal complexes.
Compound for Use in Organic Electroluminescent Device and Organic Electroluminescent Device
申请人:Komori Masaki
公开号:US20090302742A1
公开(公告)日:2009-12-10
Disclosed are an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and simple in constitution and a compound for use therein. The organic electroluminescent device comprises a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and the light-emitting layer contains a phosphorescent dopant and a compound for use in an organic electroluminescent device having two or more indolocarbazole skeletons as a host material. An example of the compound having indolocarbazole skeletons for use in the device is expressed by the following formula.