Theoretical maximum quantum efficiency in red phosphorescent organic light-emitting diodes at a low doping concentration using a spirobenzofluorene type triplet host material
摘要:
Red phosphorescent organic light-emitting diodes (PHOLEDs) with a 100% internal quantum efficiency at a low doping concentration were fabricated using a spirobenzofluorene type phosphine oxide as the host material. A spirobenzofluorene type phosphine oxide compound, 2,7-bis(diphenylphosphoryl)spiro[fluorene-7,11'-benzofluorene] (SPPO21), was synthesized as the electron transport type host material for the red phosphorescent organic light-emitting diodes. The device performances of the SPPO21 based red PHOLEDs were optimized at a low doping concentration of 1-2% because of energy transfer, little concentration quenching and charge trapping. A high external quantum efficiency of 20% was achieved for the red PHOLEDs with the SPPO21 host. (C) 2010 Elsevier B. V. All rights reserved.
Metal complex organic electroluminescent material and organic electroluminescent device
申请人:SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIAL CO., LTD.
公开号:US11424418B2
公开(公告)日:2022-08-23
The present invention relates to an organic electroluminescent material, an organic electroluminescent device, and a method for preparing the organic electroluminescent device. Due to comprising an organic compound A with 3.0 eV>ET≥2.0 eV and a compound B of M(LA)x(LB)y(LC)z, the organic electroluminescent material of the present invention has the advantages of an increased luminescence lifetime and/or a reduced operating voltage on the basis of maintaining other electronic properties at a certain level.
本发明涉及一种有机电致发光材料、一种有机电致发光器件和一种制备有机电致发光器件的方法。由于包含 3.0 eV>ET≥2.0 eV 的有机化合物 A 和 M(LA)x(LB)y(LC)z 的化合物 B,本发明的有机电致发光材料具有在保持其他电子特性在一定水平的基础上提高发光寿命和/或降低工作电压的优点。
ORGANIC ELECTROLUMINESCENT MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE
申请人:SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIAL CO., LTD.
公开号:US20200381633A1
公开(公告)日:2020-12-03
The present invention relates to an organic electroluminescent material, an organic electroluminescent device, and a method for preparing the organic electroluminescent device. Due to comprising an organic compound A with 3.0 eV>ET≥2.0 eV and a compound B of M(LA)x(LB)y(LC)z, the organic electroluminescent material of the present invention has the advantages of an increased luminescence lifetime and/or a reduced operating voltage on the basis of maintaining other electronic properties at a certain level.
INK COMPOSITION FOR FORMING AN ELECTRON TRANSPORT LAYER OF A LIGHT-EMITTING DEVICE AND A LIGHT-EMITTING DEVICE MANUFACTURED USING THE INK COMPOSITION
申请人:Samsung Display Co., Ltd.
公开号:US20220190244A1
公开(公告)日:2022-06-16
An ink composition for forming an electron transport layer of a light-emitting device of a display device includes: an electron-transporting compound including a phosphine oxide moiety; and a solvent represented by Formula 1,
(P═O)(OR
1
)(OR
2
)(OR
3
) Formula 1
wherein, in Formula 1, R
1
to R
3
each, independently from one another, are hydrogen, deuterium, or a C
1
-C
30
alkyl group, and at least one of R
1
to R
3
is a C
1
-C
30
alkyl group.
INK COMPOSITION, LIGHT-EMITTING DEVICE, AND METHOD OF MANUFACTURING THE LIGHT-EMITTING DEVICE
申请人:Samsung Display Co., Ltd.
公开号:US20220204799A1
公开(公告)日:2022-06-30
An ink composition includes: a solvent; and an electron transporting material substantially dispersed in the solvent and of Formula 1, wherein the ink composition has an Ohnesorge number of about 0.1 to about 0.2:
[Ar
1
]
b1
-[(L
1
)
a1
-R
1
]
c1
Formula 1
wherein the variables are defined herein.
[EN] ORGANIC COMPOUND TO BE USED IN ORGANIC DEVICE, AND METHOD FOR MANUFACTURING ORGANIC DEVICE BY USING SAME<br/>[FR] COMPOSÉ ORGANIQUE DEVANT ÊTRE UTILISÉ DANS UN DISPOSITIF ORGANIQUE ET PROCÉDÉ DE FABRICATION DE DISPOSITIF ORGANIQUE L'UTILISANT<br/>[KO] 유기소자에 사용되는 유기화합물 및 이를 이용한 유기소자의 제조방법
申请人:KOREA IND TECH INST
公开号:WO2017052308A2
公开(公告)日:2017-03-30
본 발명의 일실시예는 피리미딘 고리를 포함하는 작용기, 또는 카바졸을 포함하여 이루어지는 카바졸계 화합물의 말단에 피리미딘 고리를 포함하는 작용기를 적어도 1개 이상 포함하고, 상기 작용기들 간의 수소결합에 의하여 유기박막을 형성하는 것을 특징으로 하는 유기소자용 화합물을 제공한다.