TY - JOUR
T1 - Efficient deep-blue organic light-emitting diodes
T2 - Arylamine-substituted oligofluorenes
AU - Gao, Zhi Qiang
AU - Li, Zhong Hui
AU - Xia, Ping Fan
AU - Wong, Man Shing
AU - Cheah, Kok Wai
AU - Chen, Chin H.
N1 - Funding information:
This work is supported by the Research Grants Council, Earmarked Research Grant HKBU2020/06P, Hong Kong Baptist University Faculty Research Grant, FRG/05-06/I-48, and Hong Kong Innovation and Technology Commission Guangzhou-Hong Kong Industrial Support Grant, ITC/05-06/02.
Publisher copyright:
© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2007/11/5
Y1 - 2007/11/5
N2 - Novel deep-blue-light-emitting diphenylamino and triphenylamino end-capped oligofluorenes were synthesized by double palladium-catalyzed Suzuki cross-coupling of dibromo-oligofluorene with the corresponding boronic acid as a key step. These oligofluorenes exhibit deep-blue emission (λ maxem = 429-432 nm), low and reversible electrochemical oxidation (highest occupied molecular orbital = 5.15-5.20 eV), high fluorescence quantum yield (ΦFL=0.61-0.93), and good thermal properties (glass-transition temperature, Tg = 99-195°C and decomposition temperature, Tdec > 450°C). Remarkably, saturated deep-blue organic light-emitting diodes, made from these oligofluorenes as dopant emitters, have been achieved with excellent performance and maximum efficiencies up to 2.9 cd A-1 at 2 mAcm-2 (external quantum efficiency of 4.1 %) and with Commission Internationale de l'Éclairage (x,y) coordinates of (0.152,0.08), which is very close to the National Television System Committee standard blue.
AB - Novel deep-blue-light-emitting diphenylamino and triphenylamino end-capped oligofluorenes were synthesized by double palladium-catalyzed Suzuki cross-coupling of dibromo-oligofluorene with the corresponding boronic acid as a key step. These oligofluorenes exhibit deep-blue emission (λ maxem = 429-432 nm), low and reversible electrochemical oxidation (highest occupied molecular orbital = 5.15-5.20 eV), high fluorescence quantum yield (ΦFL=0.61-0.93), and good thermal properties (glass-transition temperature, Tg = 99-195°C and decomposition temperature, Tdec > 450°C). Remarkably, saturated deep-blue organic light-emitting diodes, made from these oligofluorenes as dopant emitters, have been achieved with excellent performance and maximum efficiencies up to 2.9 cd A-1 at 2 mAcm-2 (external quantum efficiency of 4.1 %) and with Commission Internationale de l'Éclairage (x,y) coordinates of (0.152,0.08), which is very close to the National Television System Committee standard blue.
UR - http://www.scopus.com/inward/record.url?scp=36049025941&partnerID=8YFLogxK
U2 - 10.1002/adfm.200700238
DO - 10.1002/adfm.200700238
M3 - Journal article
AN - SCOPUS:36049025941
SN - 1616-301X
VL - 17
SP - 3194
EP - 3199
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 16
ER -