用Suzuki缩聚反应合成了三-(2-间溴苯基吡啶)合铱为核,聚2,5-二辛氧基苯为枝的超支化电磷光绿光聚合物(PPPIrppy).当聚合物中铱配合物摩尔分数大于0.5%时,主体的发射被完全淬灭,电致发光(EL)光谱仅在520 nm处有绿光发射,表明主客体之间发生了有效的能量转移.基于铱配合物摩尔分数为1%的聚合物发光器件(器件结构:ITO/ PEDOT:PSS/emissive layer/Ba/Al,PEDOT:聚(3,4-亚乙基二氧噻吩),PSS:聚苯乙酸磺酸钠)在电流密度为40×10~(-3) A/cm~2时,最大电流效率达到2.89 cd/A,器件的最大亮度达到1 689 cd/m~2,色坐标为(0.34,0.59).
Novel hyperbranched poly(para-phenylene)s were synthesized by Suzuki polycondensation with Ir complex as core and poly(p-phenylene) as branch. The emission from the host was completely quenched when the content of Ir complex in the polymer was more than 0.5%,leading the EL spectra of the polymers to show only one main emission at 520 nm,which indicated that there was an efficient energy transfer between the host and the guest. The device based on the copolymer with 1% molar fraction of Ir complex in the polymer had a peak luminous efficiency(LE) of 2.89 cd/A,and the maximal luminance of 1 689 cd/m~2 with the configuration of ITO/PEDOT:PSS/emissive layer/Ba/Al(PEDOT:poly(3,4-ethytenedioxythiophene,PSS:poly(styenesulfonate)).
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