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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(qǐng)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

In General Formulas T-II-1 to T-II-5 above, n and n′ represent each independently an integer of 1 or greater.

XT represents a polymerizable group.

n represents an integer of 1 or greater. n is preferably an integer from 1 to 20, more preferably an integer from 1 to 15, and even more preferably an integer from 3 to 10.

n′ represents an integer of 1 or greater. n′ is preferably an integer from 1 to 10, more preferably an integer from 1 to 6, and even more preferably an integer from 1 to 3.

XT represents a polymerizable group, and concrete examples and preferred ranges thereof are the same as the concrete examples and preferred ranges of the polymerizable group that may be possessed by the alkyl group represented by RT2 in General Formula T-I above.

In terms of resistance to electrical oxidation, it is also preferable for the triphenylene derivative expressed by General Formula T-I above to be a triphenylene derivative expressed by General Formula T-III below:

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權(quán)利要求

1
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