摘要
A novel red-emitting binuclear platinum complex (dfppy)2Pt2(C8OXT)2 was synthesized and characterized,in which dfppy represents 2-(4',6'-difluorophenyl)pyridinato unit and C8OXT is abbreviated for 5-(4-octyloxyphenyl)-1,3,4-oxadiazole-2-thiol as a bridging ancillary ligand.Its photophysical,electrochemical and electroluminescent characteristics were primarily studied.The made single-emissive-layer (SEL) polymer light-emitting devices using (dfppy)2Pt2(C8OXT)2 as emitter exhibited a saturated red emission peaked at 620nm.The best device performances were obtained in the device at 8wt% dopant concentration,with a maximum external quantum efficiency of 8.4%,a current efficiency of 4.2cd/A and brightness of 3228cd/m2.This work provides an effective approach to obtain high-efficiency red emission through construction of new binuclear platinum complex and its doped SEL devices.
A novel red-emitting binuclear platinum complex (dfppy)zPtz(C^OXT)z was synthesized and characterized, in which dfppy represents 2-(4',6'-difluorophenyl)pyridinato unit and CsOXT is abbreviated for 5-(4-octyloxyphenyl)-1,3,4-oxadiazole-2-thiol as a bridging ancillary ligand. Its photophysical, electrochemical and electroluminescent characteristics were primarily studied. The made single-emissive-layer (SEL) polymer light-emitting devices using (dfppy)2Ptz(CsOXT)2 as emitter exhibited a satu- rated red emission peaked at 620 nm. The best device performances were obtained in the device at 8 wt% dopant concentration, with a maximum external quantum efficiency of 8.4%, a current efficiency of 4.2 cd/A and brightness of 3228 cd/m~. This work provides an effective approach to obtain high-efficiency red emission through construction of new binuclear platinum complex and its doped SEL devices.
基金
supported by the National Natural Science Foundation of China(50973093,51273168,21202139)
the Innovation Group Hunan Natural Science Foundation(12JJ7002)
the Natural Science Foundation of Hunan(12JJ4019,11JJ3061)
the Scientific Fundation of Hunan Provincial Education Department(10A119,11CY023,12B123)
Postgraduate Science Foundation for Innovation in Hunan Province(CX2012B249)
关键词
红光发射
二氟苯基
铂配合物
恶二唑
双核
饱和
配体
硫醇
binuclear platinum complexes, red emission, electroluminescence, oxadiazole, polymer light-emitting devices