聚氨酯共聚高分子於電激發光元件之電洞傳輸層應用

Synthesis of Polyurethane Based Hole-Transporting Materials and Application for Organic Light Emitting Diode

辜政脩(Cheng-Hsiu Ku)

指導教授 ： 謝國煌

共同指導教授 ： 梁文傑(Man- Kit Leung)

國立臺灣大學/工學院/高分子科學與工程學研究所/博士(2008年)

https://doi.org/10.6342/NTU.2008.00623

摘要

有機發光二極體將於下一個顯示器世代佔有一席之地，所以藉由不斷的材料改進與製程進步來提升此種顯示器的效率發光亮度以及壽命。本論文主要致力於合成良好的電洞注入及傳輸材料以提升發光元件的效能以及性質，並將此系列的電洞傳輸材料分子運用在有機電激發光元件中，試驗其作為電洞注入層及電洞傳輸層的性質並加以探討。且藉由不同製程方法提升元件表現 (1) 將所合成出的電洞傳輸單體利用表面修飾製程於玻璃基板上形成薄膜電洞傳輸層、(2) 利用真空蒸鍍的製程將所合成出的電洞傳輸層材料於共蒸鍍條件下形成電洞傳輸層以提升元件亮度、並利用共蒸鍍方法做為磷光與螢光發光材主體 (3) 藉由旋轉塗佈法均勻的修飾玻璃基板，將合成出的高分子材料是具有電洞傳輸性質的具羥基之卡唑衍生物和三苯基胺衍生物依不同比例以二異氰酸酯連接成聚氨酯型態，與以具羥基之卡唑衍生物以及具有電洞阻擋性質和電子傳輸性質的噁唑衍生物依不同比例以二異氰酸酯連接成聚氨酯型態共聚合物形成電洞傳輸層。聚氨酯本身結構即具有良好的電洞傳輸效果並於電激發光元件中，讓元件發光效率及亮度有效提升。

關鍵字

有機發光二極體 ； 聚氨酯 ； 電洞傳輸 ； 三苯基胺衍生物 ； 噁唑

並列摘要

There are many kinds of pathway to improve the OLED or PLED device performance. In this thesis, hole-transporting materials were been focused subject and different routes were also been provided, including using surface modified method technology to do the modification on ITO glass surface by using oligo (phenylene vilyene) silane as hole transporting layer in chapter 2, synthesized the 9-(4-pentaphenylphenylphenyl)-9H-carbazole and co-evaporated with α-NPB function as hole transporting material and host in chapter 3 and functionalized Polyurethanes containing carbazole, OXD and Triphenylamine-derived for hole-transporting material in OLED device in chapter 4, 5. New polymers and organic materials were used as the hole transport layer (HTL) to improve the device performance. Such materials are not only reduced the driving voltage but also improve the current efficiency. We also observed that the current efficiency in the device is increased due to more carrier injection and better electron-hole balance.

並列關鍵字

OLED ； Polyurethanes ； Hole-transporting ； Triphenylamine ； Carbazole

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