Fluorene- and benzimidazole-based blue light-emitting copolymers: Synthesis, photophysical properties, and PLED applications
作者:Haifeng Zhu、Hui Tong、Yongyang Gong、Shiyang Shao、Chunmei Deng、Wang Zhang Yuan、Yongming Zhang
DOI:10.1002/pola.25984
日期:2012.6.1
temperature are 103 and 428 °C, respectively. Its solutions emit blue light efficiently, with the quantum yield up to 99% in chloroform. The electroluminescence (EL) device of PFBI8 with the configuration of indium‐tin oxide/poly(ethylenedioxythiophene):poly(styrene sulfonic acid)/PFBI8/1,3,5‐tris(1‐phenyl‐1H‐benzimidazole‐2‐yl)benzene/LiF/Al emits blue light with the maximum at 448 nm. Such unoptimized polymer
蓝光发射材料由于其在光电子设备中的潜在应用而备受学术界和工业界的关注。在这项研究中,基于9,9-蓝色发光共聚物' -二辛基芴和2,2' - (1,4-亚苯基) -双(苯并咪唑)部分是通过钯催化的Suzuki偶联反应合成。虽然由未取代的苯并咪唑(PFBI0)组成的共聚物不溶于常见的有机溶剂,但其对应物为N辛基取代的苯并咪唑(PFBI8)在甲苯,四氢呋喃,二氯甲烷(DCM)和氯仿中具有良好的溶解性。PFBI8共聚物显示出良好的热稳定性,其玻璃化转变温度和起始分解温度分别为103和428°C。它的溶液有效地发出蓝光,在氯仿中的量子产率高达99%。PFBI8的电致发光(EL)器件,配置为氧化铟锡/聚(乙撑二氧噻吩):聚(苯乙烯磺酸)/ PFBI8 / 1,3,5-三(1-苯基-1H-苯并咪唑-2-基)苯/ LiF / Al发出的蓝光最大为448 nm。这种未经优化的聚合物发光二极管(PLED)的最大亮度为1534