高分子發光二極體(PLED)近十年來倍受學界與產業界的注目，但此種發光元件目前還有一些問題仍待克服。為了改善全共軛高分子光色不純、濃度萃熄效應、成膜不均勻等問題，主鏈含孤立發光(電洞傳送)與電子傳送單位的交互共聚物無法改變發光(電洞傳送)/電子傳送單位含量比的缺點，以及側鏈含發光單位高分子合成方法中，反應控制不易、難以合成團聯共聚物等問題，本研究利用可控制型活性自由基聚合法中的RAFT聚合法製備側鏈含發光(電洞傳送)單位與電子傳送單位之電激發光高分子材料。

　　本研究取以RAFT聚合法合成的前驅共聚物，分別與二苯乙烯苯發光團及1,3,4-噁二唑電子傳送基團利用Willamson縮合反應的方式合成出高分子P1~P3。在物理性質上，P1、P3高分子並沒有發現熔點(Tm)及玻璃轉移溫度(Tg)的出現，而P2的玻璃轉移溫度為116℃，P1~P3的熱裂解溫度(Td)分別為381℃、362及372℃，並可觀察到主鏈及側鏈裂解的情形。在光學性質上，P1~P3可稀釋發光團濃度，降低濃度萃熄效應，另外觀察P1、P2摻和後能量轉移情形，在P2/P1=5/95及P2/P1=10/90可造成完全能量轉移，並與P4比較能量轉移機制的差異與影響。在電化學上，循環伏安法推算出P1~P3 HOMO與LUMO能階，進而求出能帶間隙，並利用模式化合物探討電子及電洞注入情形。在元件方面，雙層元件P1及P2:P2=10:90的起始電場分別為8.60×105 V/cm和8.08×105 V/cm，其最大輝度分別為1.50 cd/m2和1.88 cd/m2，發現摻合後其元件性質不如預期，這與高分子膜態的微相分離有密切關係。

　Electroluminescent (EL) polymers for light-emitting diode (LED) intrigued interests in both academic and industrial circles due to their potential application in flat and large area displays. However, some aspects need further improvement to enhance their commercialization possibility. In order to improve color impurity compared with fully conjugated polymers and concentration quenching effect, this research employed one of controlled/living free radical polymerization (CRP) to prepare EL polymers containing pendant emitting and　electron-
transporting chromophores.

　In this work, three novel copolymers P1~P3 consisting of the distyryllbenzene fluorophores or 1,3,4-Oxadiazole have been synthesized by　Williamson condensation with precursor copolymer by controlled/living free radical polymerization. The copolymers were completely soluble in common organic solvents, and defect-free optical thin film was easily spin-coated onto the indium tin oxide (ITO) substrate. The UV/vis absorption and PL spectra of P1~P3 in CHCl3 and in films have be charactered. By blend system of P1 and P2, the behavior of energy transfer from P2 to P1 have be discussed in detail. The HOMO and LUMO energy levels of these copolymers have been estimated from their cyclic voltammograms. In order to understand the mechanism of hole and electron injection in devices by the method of cyclic voltammograms, four model compounds were also synthesized. Double layer devices ITO/PEDOT/copolymers/Al were fabricated. The initial electric field and maximum luminance of ITO/PEDOT/P2:P1=10:90/Al were 8.08×105 V/cm and 1.88 cd/m2, respectively. The performance of　devices of blend system was less than expected, the phase separation forming in film dominate the phenomenon.

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