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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

The π-conjugated compounds expressed by General Formula R-1 will now be described. These compounds are charge transporting amine-based π-conjugated compounds that do not exhibit a distinct melting point, have a glass transition point of 60° C. or higher, and have a molecular weight in the range of 400 to 2500, and the ratio (L/D) of the length (L) and diameter (D) of the smallest diameter cylinder inscribed by the π-conjugated compound is 2.5 or more.

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(Here, Ar1 to Ar3 represent each independently a divalent C6 to C30 aromatic hydrocarbon group, Ar4 to Ar7 represent each independently a C6 to C30 aromatic hydrocarbon group, the two aromatic hydrocarbon groups that make up Ar4 and Ar5 may bond via a direct bond or via a substituent to form a condensed heterocycle with the nitrogen atoms which Ar4 and Ar5 replace, and the two aromatic hydrocarbon groups that make up Ar6 and Ar7 may bond via a direct bond or via a substituent to form a condensed heterocycle with the nitrogen atoms which Ar6 and Ar7 replace. L1 and L2 represent each independently a vinylene group or an acetylene group. l, m, n, o, and p represent each independently an integer from 0 to 6, but one of 1, n, and p is not 0.)

Preferable examples of the π-conjugated compounds expressed by General Formula R-1 are the π-conjugated compounds expressed by General Formula R-2 or R-3 below:

權(quán)利要求

1
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