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-octyl...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.展开更多
基金supported by the National Natural Science Foundation of China(50973093,51273168,21202139)the Innovation Group Hunan Natural Science Foundation(12JJ7002)+2 种基金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)
文摘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.
