TY - JOUR
T1 - Benzobisoxazole-based electron transporting materials with high Tg and ambipolar property
T2 - High efficiency deep-red phosphorescent OLEDs
AU - Yin, Xiaojun
AU - Zhang, Tingke
AU - Peng, Qiming
AU - Zhou, Tao
AU - Zeng, Weixuan
AU - Zhu, Zece
AU - Xie, Guohua
AU - Li, Feng
AU - Ma, Dongge
AU - Yang, Chuluo
N1 - Publisher Copyright:
© The Royal Society of Chemistry 2015.
PY - 2015/8/7
Y1 - 2015/8/7
N2 - Two new benzobisoxazole-based compounds, namely, 4,8-bis(3,5-di(pyridin-3-yl)phenyl)-2,6-dimethylbenzo[1,2-d:4,5-d′]bis(oxazole) (3Py-DBBO) and 4,8-bis(4-yl-triphenylphosphine oxide)-2,6-dimethylbenzo[1,2-d:4,5-d′]bis(oxazole) (TPO-DBBO), were synthesized and characterized. The steric effect of the ortho hydrogens on the phenyl ring at 4,8-positions of benzobisoxazole resulted in out-of-plane twisting, and consequently a decrease of the intermolecular π-π interaction. The two new compounds showed excellent thermal stabilities with high glass-transition temperatures (Tg) of 248 °C for 3Py-DBBO and 142 °C for TPO-DBBO. The two compounds exhibited ambipolar transport properties, with both electron and hole mobilities of 10-6-10-5 cm2 V-1 s-1. Using the compounds as electron-transport materials, the deep-red phosphorescent organic light-emitting devices achieved a maximum external quantum efficiency up to 19.3%.
AB - Two new benzobisoxazole-based compounds, namely, 4,8-bis(3,5-di(pyridin-3-yl)phenyl)-2,6-dimethylbenzo[1,2-d:4,5-d′]bis(oxazole) (3Py-DBBO) and 4,8-bis(4-yl-triphenylphosphine oxide)-2,6-dimethylbenzo[1,2-d:4,5-d′]bis(oxazole) (TPO-DBBO), were synthesized and characterized. The steric effect of the ortho hydrogens on the phenyl ring at 4,8-positions of benzobisoxazole resulted in out-of-plane twisting, and consequently a decrease of the intermolecular π-π interaction. The two new compounds showed excellent thermal stabilities with high glass-transition temperatures (Tg) of 248 °C for 3Py-DBBO and 142 °C for TPO-DBBO. The two compounds exhibited ambipolar transport properties, with both electron and hole mobilities of 10-6-10-5 cm2 V-1 s-1. Using the compounds as electron-transport materials, the deep-red phosphorescent organic light-emitting devices achieved a maximum external quantum efficiency up to 19.3%.
UR - http://www.scopus.com/inward/record.url?scp=84937130136&partnerID=8YFLogxK
U2 - 10.1039/c5tc01353d
DO - 10.1039/c5tc01353d
M3 - 文章
AN - SCOPUS:84937130136
SN - 2050-7526
VL - 3
SP - 7589
EP - 7596
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 29
ER -