Four new bipolar Indolo[3,2-b]carbazole derivatives for blue OLEDs
Document Type
Article
Publication Date
3-1-2021
Abstract
Four new indolo [3,2-b]carbazole derivatives containing imidazole-derived moieties, 2,8-bis(4-(9-(4-(tert-butyl)phenyl)-9H-pyreno [4,5-d]imidazol-10-yl)phenyl)-5,11-bis(2-ethylhexyl)-5,11-dihydroindolo [3,2-b]carbazole (Py-ICZ-Py), 2,8-bis(4-(1-(4-(tert-butyl)phenyl)-1H-phenanthro [9,10-d]imidazol-2-yl)phenyl)-5,11-bis(2-ethylhexyl)-5,11-dihydroindolo [3,2-b]carbazole (PI-ICZ-PI), 5,11-bis(2-ethylhexyl)-2,8-bis(4-(1-phenyl-1H-benzo [d]imidazol-2-yl)phenyl)-5,11-dihydroindolo [3,2-b]carbazole (BI-ICZ-BI) and 2,8-bis(4-(1-(4-(tert-butyl)phenyl)-4,5-diphenyl-1H-imidazol-2-yl)phenyl)-5,11-bis(2-ethylhexyl)-5,11-dihydroindolo [3,2-b]carbazole (IM-ICZ-IM), were successfully synthesized for highly efficient blue light-emitting devices. The thermal stabilities, photophysical and electrochemical properties of the hybrid compounds were investigated. These hybrid compounds exhibited strong blue emissions in solutions. Furthermore, the vacuum-processed doped devices based on these compounds were fabricated, in which the devices based on the compound PI-ICZ-PI exhibited the best electroluminescence performance with a maximum brightness of 3973 cd/m2, a maximum current efficiency of 3.67 cd/A and a maximum external quantum efficiency (EQE) of 2.64%.
Identifier
85098114780 (Scopus)
Publication Title
Dyes and Pigments
External Full Text Location
https://doi.org/10.1016/j.dyepig.2020.109096
e-ISSN
18733743
ISSN
01437208
Volume
187
Grant
51563014
Fund Ref
National Natural Science Foundation of China
Recommended Citation
Yang, Hongyan; Li, Yanmei; Zhao, Yuling; Yu, Shupei; Ma, Hailin; Qian, Long; Wang, Ruidong; Yu, Tianzhi; and Su, Wenming, "Four new bipolar Indolo[3,2-b]carbazole derivatives for blue OLEDs" (2021). Faculty Publications. 4292.
https://digitalcommons.njit.edu/fac_pubs/4292