Electroluminescence Characteristics of a New Green-Emitting Phenothiazine Derivative with Biphenyl Benzimidazole Substituent
摘要:
We report on the synthesis and electroluminescence characteristics of a new green-emitting material, 3,7-bis(1-(biphenyl-4-yl)benzimidazol-2-yl) 10-methylphenothiazine (PhBBMP) containing the electron-donating phenothiazine core and the electron-accepting biphenyl benzimidazole substituent. An optimized OLED device with the structure of [ITO/NPB (40 nm)/PhBBMP (30 nm)/BCP (10 nm)/TPBI (30 nm)/LiF (1 nm)/Al (100 nm)] exhibited a luminous efficiency of 4.5 cd/A and an external quantum efficiency of 0.9% at 100mA/cm(2), and the maximum luminance of 12,000 cd/m(2) with the CIE 1931 chromaticity coordinates of (0.21, 0.54). A more balanced charge carrier injection and the charge confinement in the emitting layer cooperatively contributed to improve the performance of the device prepared with the PhBBMP emitting layer.
[EN] MATERIALS FOR ORGANIC ELECTROLUMINESCENT DEVICES<br/>[FR] MATÉRIAUX POUR DISPOSITIFS ÉLECTROLUMINESCENTS ORGANIQUES
申请人:MERCK PATENT GMBH
公开号:WO2018091435A1
公开(公告)日:2018-05-24
The present invention relates to compounds of the formula (1) which are suitable for use in electronic devices, in particular organic electroluminescent devices, and to electronic devices, which comprise these compounds.
Disclosed is an electroluminescent device comprising a light emitting layer comprising a boron complex wherein the boron is bonded to a nitrogen atom of a 6-membered heteroaromatic ring group and to a nitrogen atom of a 5-membered heteroaromatic ring group, provided that the 5- and 6-membered heteroaromatic ring groups are further connected by an imine group, and provided that the 5-membered heteroaromatic ring group contains at least one additional heteroatom that is divalent or trivalent, and a process or device employing the device.
[EN] ORGANIC ELEMENT FOR ELECTROLUMINESCENT DEVICES<br/>[FR] ELEMENT ORGANIQUE POUR DISPOSITIFS ELECTROLUMINESCENTS
申请人:EASTMAN KODAK CO
公开号:WO2005075599A1
公开(公告)日:2005-08-18
Disclosed is an electroluminescent device comprising a light emitting layer comprising a boron complex wherein the boron is bonded to a nitrogen atom of a 6-membered heteroaromatic ring group and to a nitrogen atom of a 5-membered heteroaromatic ring group, and provided that the 5- and 6-membered heteroaromatic ring groups are further connected by an imine group, and provided that the 5-membered heteroaromatic ring group contains at least one additional heteroatom that is divalent or, trivalent, and a process or device employing the device.