TY - JOUR
T1 - A star-shaped bipolar host material based on carbazole and dimesitylboron moieties for fabrication of highly efficient red, green and blue electrophosphorescent devices
AU - Shi, Heping
AU - Xin, Dehua
AU - Dong, Xiuqing
AU - Dai, Jian Xin
AU - Wu, Xiaohuan
AU - Miao, Yanqin
AU - Fang, Li
AU - Wang, Hua
AU - Choi, Martin M.F.
N1 - This work was supported by the Natural Science Foundation of Shanxi Province (2013011013-1); Open Fund of the State Key Laboratory of Luminescent Materials and Devices, South China University of Technology (2014-skllmd-09); Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province (2012005); Program for Changjiang Scholar and Innovation Research Team in University (IRT0972); International Science & Technology Cooperation Program of China (2012DFR50460); National Natural Scientific Foundation of China (21101111, 61205179, 61307030, 61307029); Shanxi Provincial Key Innovative Research Team in Science and Technology (2012041011); Shanxi Scholarship Council of China (2012-006); Hundred Talent Programme of Shanxi Province, and Fund of Key Laboratory of Optoelectronic Materials Chemistry and Physics, Chinese Academy of Sciences (2008DP173016).
PY - 2014/3/28
Y1 - 2014/3/28
N2 - A new bipolar host material based on carbazole and dimesitylboron moieties, 3,6-bis(dimesitylboryl)-9-(4-(dimesitylboryl)phenyl) carbazole (BDDPC), has been successfully synthesised and characterised by elemental analysis, nuclear magnetic resonance spectroscopy, mass spectrometry and thermogravimetric analysis. The electrochemical and photophysical properties of BDDPC are studied by both experimental and theoretical methods. BDDPC exhibits excellent thermal stability (Td = 234 °C), electrochemical stability, high fluorescence quantum yield (0.95) and high triplet energy (2.83 eV). A red phosphorescent organic light-emitting diode (PhOLED) device comprising BDDPC as the host material and Os(bpftz)2(PPh2Me)2 as the dopant is fabricated and displays promising electrophosphorescence properties with a turn-on voltage of 3.0 V, a maximum brightness of 12337 cd m-2 and a maximum current efficiency of 11.04 cd A-1. Similarly, BDDPC is used to fabricate a green PhOLED device with Ir(ppy) 2(acac) as the dopant, possessing a turn-on voltage of 2.5 V, a maximum brightness of 26473 cd m-2 and a maximum current efficiency of 38.60 cd A-1. Furthermore, a blue PhOLED device with BDDPC as the host material and FIrpic as the dopant is fabricated with a turn-on voltage of 3.0 V, a maximum brightness of 7622 cd m-2 and a maximum current efficiency of 7.39 cd A-1. It is anticipated that BDDPC has great potential in manufacturing PhOLED devices for display or lighting applications.
AB - A new bipolar host material based on carbazole and dimesitylboron moieties, 3,6-bis(dimesitylboryl)-9-(4-(dimesitylboryl)phenyl) carbazole (BDDPC), has been successfully synthesised and characterised by elemental analysis, nuclear magnetic resonance spectroscopy, mass spectrometry and thermogravimetric analysis. The electrochemical and photophysical properties of BDDPC are studied by both experimental and theoretical methods. BDDPC exhibits excellent thermal stability (Td = 234 °C), electrochemical stability, high fluorescence quantum yield (0.95) and high triplet energy (2.83 eV). A red phosphorescent organic light-emitting diode (PhOLED) device comprising BDDPC as the host material and Os(bpftz)2(PPh2Me)2 as the dopant is fabricated and displays promising electrophosphorescence properties with a turn-on voltage of 3.0 V, a maximum brightness of 12337 cd m-2 and a maximum current efficiency of 11.04 cd A-1. Similarly, BDDPC is used to fabricate a green PhOLED device with Ir(ppy) 2(acac) as the dopant, possessing a turn-on voltage of 2.5 V, a maximum brightness of 26473 cd m-2 and a maximum current efficiency of 38.60 cd A-1. Furthermore, a blue PhOLED device with BDDPC as the host material and FIrpic as the dopant is fabricated with a turn-on voltage of 3.0 V, a maximum brightness of 7622 cd m-2 and a maximum current efficiency of 7.39 cd A-1. It is anticipated that BDDPC has great potential in manufacturing PhOLED devices for display or lighting applications.
UR - http://www.scopus.com/inward/record.url?scp=84896830855&partnerID=8YFLogxK
U2 - 10.1039/c3tc32236j
DO - 10.1039/c3tc32236j
M3 - Journal article
AN - SCOPUS:84896830855
SN - 2050-7526
VL - 2
SP - 2160
EP - 2168
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 12
ER -