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Organoelectroluminescent element, and light emission device, display device, and illumination device in which said organoelectroluminescent element is used

專利號(hào)
US11177450B2
公開日期
2021-11-16
申請人
Naoyuki Hayashi; Hideki Yasuda; Koji Takaku（IE Dublin）
發(fā)明人
Naoyuki Hayashi; Hideki Yasuda; Koji Takaku
IPC分類
H01L51/50; H01L51/00
技術(shù)領(lǐng)域
group,layer,atom,preferably,emitting,ligand,ring,light,nm,in
地域： Kanagawa

摘要

An organoelectroluminescent element which can satisfy both a high external quantum efficiency and high power efficiency at the same time, which has on a substrate an anode, a first intermediate organic layer composed of at least one organic layer, a light-emitting layer, a second intermediate organic layer composed of at least one organic layer, and a cathode in this order, and in which light is extracted from the aforementioned anode side, wherein the aforementioned light-emitting layer contains a light-emitting material that is oriented in the horizontal direction with the substrate, the order parameter of the aforementioned light-emitting material in the aforementioned light-emitting layer is at least 0.7, and the relationship between the thickness T1 (nm) of the aforementioned first intermediate organic layer and the thickness T2 (nm) of the aforementioned second intermediate organic layer is such that 1.1

說明書

A mode is also preferable in which at least one of A507, A508, and A509 and at least one of A510, A511, and A512 are nitrogen atoms, and in the case of this mode, it is preferable for A510 or A507 to be a nitrogen atom.

One of the more preferred modes of the platinum complex expressed by General Formula C-5 is a platinum complex expressed by General Formula C-5-1 below:

embedded image

In the formula, X, Y, and Z represent each independently a carbon atom or a nitrogen atom. However, either Z or Y is a nitrogen atom. When Y is a nitrogen atom, X is a carbon atom. m, n, p, and q represent each independently an integer from 0 to 3. Ar represents a substituted or unsubstituted aryl group. R1 to R4 represent each independently an alkyl group, an aryl group, an alkoxy group, an aryloxy group, a fluorine atom, a cyano group, a silyl group, or a heterocyclic group. If m, n, p, and q are 2 or greater, respectively adjacent ones of the plurality of R1 to R4 [groups] may be linked to each other to form a cyclic structure.

General Formula C-5-1 will now be described.

X, Y, and Z represent a carbon atom or a nitrogen atom, either Z or Y is a nitrogen atom, and when Y is a nitrogen atom, X is a carbon atom. It is preferable for Z to be a carbon atom, for Y to be a nitrogen atom, and for X to be a carbon atom.

權(quán)利要求

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