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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(kāi)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(shuō)明書(shū)

The silyl groups are preferably with a carbon number of 3 to 20, and concrete examples include a trimethylsilyl group, a dimethylphenylsilyl group, a dimethylbutylsilyl group, a triisopropylsilyl group, and a methyldibutylsilyl group.

The heterocyclic groups represented by RP1 to RP10 are preferably with a carbon number of 3 to 10, and concrete examples include a pyridyl group, a thienyl group, an oxazole group, an oxadiazole group, a benzothienyl group, a dibenzofuryl group, a dibenzothienyl group, a pyrazyl group, a pyrimidyl group, a pyrazoyl group, an imidazoyl group, and a phenylcarbazoyl group.

The alkylamino groups represented by RP1 to RP10 are preferably with a carbon number of 1 to 10, and concrete examples include a dimethylamino group, a diethylamino group, a dipropylamino group, and a dibutylamino group.

The arylamino groups represented by RP1 to RP10 are preferably with a carbon number of 6 to 30, and concrete examples include a diphenylamino group, a carbazoyl group, and a phenylnaphthylamino group.

權(quán)利要求

1
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