基于5-芳基-2-巯基噁二唑辅助配体的双核环金属铂配合物的合成及高效电致红光发光器件

设计合成了一种新型的基于5-芳基-2-巯基噁二唑辅助配体的双核环金属铂配合物（dfppy）2Pt2（C8OXT）2,其中dfppy为2-（4,6-二氟苯基）吡啶,C8OXT为5-苯基-2-巯基-1,3,4-噁二唑桥连配体.系统研究了该双核铂配合物（dfppy）2Pt2（C8OXT）2的热稳定性、光物理、电化学及电致发光性能.以（dfppy）2Pt2（C8OXT）2作为客体掺杂到聚合物主体材料中制备了单发光层聚合物电致发光器件.器件展现了饱和的红光发射,其最大发射峰为620nm.当配合物掺杂浓度为8wt%时,器件性能达到最好.其最高外量子效率为8.4%,最高电流效率为4.2cd/A,最大亮度为3228cd/m2.本研究表明,以5-苯基-2-巯基-1,3,4-噁二唑作为桥连配体的双核铂配合物在聚合物器件中能够实现高效红光发射.

Highly efficient red emission from binuclear cyclo-metalated platinum complexes bridged with 5-aryloxadiazole-2-thiol in PLEDs

A novel red-emitting binuclear platinum complex （dfppy）2Pt2（CsOXT）2 was synthesized and characterized, in which dfppy represents 2-（4＇,6＇-difluorophenyl）pyridinato unit and C8OXT is abbreviated for 5-（4-octyloxy- phenyl）-1,3,4-oxadiazole-2-thiol as a bridging ancillary ligand. Its photophysical, electrochemical and electro- luminescent 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 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^2. This work provides an effective approach to obtain high-efficiency red emission through construction of new binuclear platinum complex and its doped SEL devices.