近年來，白光高分子有機發光二極體(WPLEDs)正朝向液晶顯示器的背光源、全彩顯示器以及固態照明等應用的方向發展。而聚芴及其衍生物具有高量子效率(光激發光和電激發光；PL & EL)、良好的熱穩定性、抗氧化能力、溶解度及易調整發光波長等特性，常被拿來當作WPLEDs共聚合的主結構。
本研究利用Yamamoto聚合的方法，將dioctylfluorene單體、當作橘色染料的銥錯合物(M1)與當作綠色染料的naphthalimide衍生物(M2)共聚合，再以2-(4-Bromophenyl)-5-phenyl-1,3,4-oxadiazole進行尾端終結反應，可得到一種新的白光發光二極體材料。所有的高分子共聚物都具有不錯的熱穩定性，其5 %熱重損失(T5d)介於377~422 °C，玻璃轉移溫度(Tg)則為89~106 °C。經由調整三個單體的莫耳分率，在元件結構為indium tin oxide / poly(3,4-ethylenedioxythiophene)：poly(styrene sulfonic acid) / polyvinylcarbazole (PVK) / emission layer / Ca / Ag的情況下，我們可以得到發白光的元件。其最大亮度為184 cd/m2，電流密度是1250 A/m2，Commission Internationale de l’Eclairage (CIE)座標為(0.333, 0.334)，而且高分子共聚物的電激發光光譜在不同電壓下，都有不錯的色彩穩定性。

White polymeric light-emitting diodes (WPLEDs) are under active development for their potential applications as backlights for liquid crystal displays, full color displays, and solid-state lighting. Polyfluorene and its derivatives which have the advantages of high efficient emission in both photoluminescence and electroluminescence, high thermal stability, good oxidative resistance, good solubility are often used as the main structure of the copolymers.
In this study, all copolymers were synthesized by Nickel-catalyzed Yamamoto coupling reaction. Dioctylfluorene monomer was copolymerized with iridium complexes and naphthalimide derivatives and then end-capped with 2-(4-Bromophenyl)-5-phenyl-1,3,4-oxadiazole to remove rear-end bromines. New white polymeric light-emitting diodes (WPLEDs) have been developed. All of the copolymers have good thermal stability with 5 % weight loss temperatures (T5d) at 377~422 °C and glass transition temperatures (Tg) at 89~106 °C. We obtained white-light-emission devices by adjusting the molar ratio of the co-monomers with a structure of indium tin oxide / poly(3,4-ethylenedioxythiophene)：poly(styrene sulfonic acid) / polyvinylcarbazole (PVK) / emission layer / Ca / Ag. The highest brightness in such a device configuration is 184 cd/m2 at a current density of 1250 A/m2 with CIE color coordinates of (0.333, 0.334). The EL spectra show color stability over different operating voltages.

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