A new blue-emitting benzothiazole derivative for organic electroluminescent devices

Citation
Xh. Zhang et al., A new blue-emitting benzothiazole derivative for organic electroluminescent devices, MAT SCI E B, 85(2-3), 2001, pp. 182-185
Citations number
7
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
ISSN journal
0921-5107 → ACNP
Volume
85
Issue
2-3
Year of publication
2001
Pages
182 - 185
Database
ISI
SICI code
0921-5107(20010822)85:2-3<182:ANBBDF>2.0.ZU;2-U
Abstract
A benzothiazole derivative (BT) with a high fluorescence quantum yield (phi (f) = 0.92) was synthesized and first used as a dopant in a blue organic e lectroluminescent device. TPD is N,N ' -bis(3-methylphenyl)-N,N ' -diphenyl -1,1 ' -biphenyl-4,4 ' -diamine and was used as a hole-transporting materia l; DPBI is a dimer of N-arylbenzimidazole and was used as an electron-trans porting material as well as the host for the blue-emitting dopant, BT. A de vice with a structure of ITO/TPD/DPBI-2% BT/DPBI/Mg-Ag was fabricated. The devices showed electroluminescence with an emission peak around 475 mn. A l uminance of 1260 cd m(-2) was achieved at a current density of 400 mA cm(-2 ). The current efficiency of this device is about 0.50 cd A(-1) at 5 V. (C) 2001 Elsevier Science B.V. All rights reserved.