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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
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

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In the formula, RP1 to RP10 represent each independently a hydrogen atom, an aromatic hydrocarbon group that may have a substituent, an alkyl group that may have a substituent, a silyl group that may have a substituent, a heterocyclic group that may have a substituent, an alkylamino group that may have a substituent, or an arylamino group that may have a substituent, and at least one of RP1 to RP10 is a group other than a hydrogen atom.

<RP1 to RP10>

(Type of Substituents RP1 to RP10)

RP1 to RP10 represent each independently a hydrogen atom, an aromatic hydrocarbon group which may have a substituent, an alkyl group which may have a substituent, a silyl group which may have a substituent, a heterocyclic group which may have a substituent, an alkylamino group which may have a substituent, or an arylamino group which may have a substituent. These may be bonded to each other and condensed into a ring.

At least one of RP1 to RP10 is a group other than a hydrogen atom.

If two or more of RP1 to RP10 are a group other than a hydrogen atom, such a plurality of groups other than a hydrogen atom may be the same or different. It is preferable for these to be the same in terms of ease of synthesis, but it is preferable for these to be different in terms of allowing tuning of the emission wavelength.

權(quán)利要求

1
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