Abstract：Photo-physical properties of iridium complexes bis(1-(2',4'-difluorobiphenyl -4-yl)isoquinoline)iridium(III)(5-(4-(bis(4-methoxyphenyl)amino)phenyl)picolinic acid) used as phosphorescent dopant in polymer light-emitting devices with a blend of poly(9,9-dioctylfluorene) and 2-tert-butyl-phenyl-5-biphenyl-1,3,4-oxadiazole as a host matrix are investigated. The iridium complex exhibits distinct UV-vis absorption bands around 300–450 nm and intense red photoluminescent emissions peaked at around 618 nm in dichloromethane. The devices display a maximum external quantum efficiency of 4.8% and luminous efficiency of 3.1 cd?A?1 at current density of 3.2 mA?cm?2 with a dominant red emission peak around 620 nm and a shoulder around 660 nm. At 100 mA?cm?2, the devices still display a maximum external quantum efficiency as high as 3.9%.
. [J]. 中国物理快报, 2012, 29(12): 127801-127801.
HU Zheng-Yong, YANG Jian-Kui, LUO Jing, LIANG Min, WANG Jing. A Novel Efficient Red Emitting Iridium Complex for Polymer Light Emitting Diodes. Chin. Phys. Lett., 2012, 29(12): 127801-127801.
2012, Vol. 29 
