白丝美女被狂躁免费视频网站,500av导航大全精品,yw.193.cnc爆乳尤物未满,97se亚洲综合色区,аⅴ天堂中文在线网官网

Organic electroluminescent device

專(zhuān)利號(hào)
US11177444B2
公開(kāi)日期
2021-11-16
申請(qǐng)人
LG CHEM, LTD.（KR Seoul）
發(fā)明人
Dongheon Kim; Kongkyeom Kim; Hyungjin Lee; Nansra Heo; Woochul Lee
IPC分類(lèi)
C07C15/28; C07D471/10; C07D251/24; H01L51/00; H01L51/50; C07D307/91; C09K11/06
技術(shù)領(lǐng)域
group,or,aryl,heteroaryl,atoms,carbon,alkyl,layer,host,material
地域： Seoul

摘要

The present specification relates to an organic electroluminescent device comprising: a first electrode; a second electrode; and an organic material layer provided between the first electrode and the second electrode, wherein the organic material layer comprises a light emitting layer and an electron transfer layer, the light emitting layer comprises a first host material, a second host material and a dopant material, the first host material has a HOMO energy level of ?5.9 eV or lower, and the second host material has a HOMO energy level higher than a HOMO energy level of the first host material by 0.1 eV to 0.2 eV.

說(shuō)明書(shū)

Having a HOMO energy level of the second host material higher than a HOMO energy level of the first host material by greater than Δ0.2 eV or higher by less than Δ0.1 eV is disadvantageous in terms of current efficiency and/or a lifetime.

In the present specification, an “electron donor” is a side giving electrons when exchanging electron between atoms, molecules or ions.

In the present specification, an “electron acceptor” is a side receiving electrons from the other side when exchanging electron between atoms, molecules or ions.

In the present specification, a description of a certain part “comprising” certain constituents means capable of further including other constituents, and does not exclude other constituents unless particularly stated on the contrary.

In the present specification, a description of a certain member being placed “on” another member includes not only a case of the one member adjoining the another member but a case of still another member being present between the two members.

Examples of substituents in the present specification will be described below, however, the substituents are not limited thereto.

In the present specification, the term “substitution” in the present specification means a hydrogen atom bonding to a carbon atom of a compound is changed to another substituent, and the position of substitution is not limited as long as it is a position at which the hydrogen atom is substituted, that is, a position at which a substituent can substitute, and when two or more substituents substitute, the two or more substituents may be the same as or different from each other.

權(quán)利要求

1
微信群二維碼
意見(jiàn)反饋