【作者】 曾惠卷； 林美娟； 李冬冬； 罗才平； 凌启淡；

【Author】 ZENG Huijuan;LIN Meijuan;LI Dongdong;LUO Caiping;LING Qidan;College of Materials Science and Engineering,Fujian Normal University;

【机构】 福建师范大学材料科学与工程学院；

【摘要】 电磷光聚合物发光器件(PhPLED)因其可同时利用单线态和三线态激子,使理论内量子效率达到100%,并且可通过低成本的溶液加工方法来制备大面积器件,近年来吸引了研究者的眼球1。本文通过Suzuki缩聚反应合成了聚芴-咔唑(PFCz)共轭主链上含铱配合物的磷光共聚物,研究了共聚物的光物理性能,电化学性能及热稳定性能。结果表明,与铱配合物相比,共聚物PL光谱主要呈现铱配合物的荧光峰且红移,同时随着铱配合物比例(2.5%、5%及10%)增加,铱配合物的荧光峰逐渐增强,而聚合主体PFCz的蓝光发射峰逐步减弱,说明从聚合物主体到铱配合物发生了有效的Forster能量转移。共聚物失重5%所对应的热分解温度分别为352℃、375℃和367℃,表明聚合物具有良好的热稳定性。更多还原

【Abstract】 Electrophosphorescent polymer light-emitting diodes(PhOLED) based on iridium complexes have attracted considerable attention not only they can harvest both singlet and triplet excitons, leading to theoretical internal quantum efficiencies of 100%, but also they can be fabricated to large-area devices by low-cost solution process1. The polyfluorene-carbazole(PFCz)-based copolymers containing a iridium complex on the main chain were synthesized by Suzuki polycondensation and characterized. The results indicated that the emission intensity of PFCz decreased significantly as the iridium complex concentration increasing, whereas the peak emission from the iridium complex was enhanced and showed a bathochromic-shift, indicating efficient energy transfer from PFCz to the iridium complex. TG experiments demonstrated these copolymers all have good thermal stability and the decomposition temperatures for 5% weight loss were 352℃, 375℃ and 367℃ respectively.更多还原