在新的平面顯示技術中，有機發光二極體是最具有潛力的產品，因其具有低超作電壓、低耗電量、自發光、高亮度、應答速度快、高對比、廣視角、輕量薄型、可撓曲性、可全彩化等特性，是最被為看好的下一世代平面顯示技術。而發展主動式矩陣的面板技術，更可因應未來高資訊量，高解析度的需求。
本論文即是以有機薄膜電晶體和有機發光二極體為主動元件，來製作有機主動式矩陣畫素。並嘗試利用有機高分子半導體材料P3HT來取代傳統重摻雜的電動傳輸層(PEDOT:PSS)。如此的製程步驟只要一次旋轉塗佈有機半導體材料P3HT即可同時製作有機薄膜電晶體的主動層，與有機發光二極體的電洞傳輸層，達到製程簡化的目的。
本研究首先製作單一有機薄膜電晶體驅動有機發光二極體的元件，算是簡單的主動式驅動，但此結構不能提供任何畫像素的記憶功能，對於主動畫素LED面積為100μm x 100μm來說，最大的汲極電流可提供3.6μA，此時PLED亮度最高可達490cd/m2。
接著研究方向朝向製作出具有記憶功能的元件，每一個有機發光二極體搭配兩個有機薄膜電晶體和一個電容。這樣的設計方式可以減少驅動電流和改善有機電激發光顯示器材料的壽命。本實驗成功地製作出兩個有機電晶體與電容整合在同一基板上，並在脈衝方波的操作下，2T1C電路可以提供連續的輸出電流，如此整合有機發光二極體，便可使之持續發亮，達到儲存資訊的功能。

Organic light-emitting diodes (OLEDs) are the most potential technology for flat panel display. OLEDs possess many advantages, such as low operation voltage, low power consumption, self-emissive source, high brightness, short response time, good contrast ratio, large viewing angle, thin and lightweight, visibility at all lighting levels, and flexibility. OLEDs are therefore promising technology in the next-generation flat panel display. Among various forms of OLEDs, active-matrix OLED, which meets the requirements of high data rate and high resolution, is the most important one.

In this thesis, we use organic thin-film transistor (OTFT) and organic light-emitting diode (OLED) as active devices, in order to fabricate organic active-matrix pixel. We use polymer semiconductor material P3HT to replace conventional hole transport layer, PEDOT:PSS, so that only one processing step is required. With such one processing step, the polymer semiconductor material P3HT for both active layer of OTFT and hole transport layer of PLED are prepared. By this way, we could reduce the processing steps for active-matrix driving PLED.

Firstly, we fabricate simple active-matrix pixel, with one OTFT and one PLED. But storage capacitors are not provided, and no memory effect is supplied. For the active-matrix pixel area 100μm x 100μm, this device can supply maximum drain current 3.6μA for PLED, and PLED brightness can reach 490cd/m2 at the same time.

After successful fabrication of the simple active-matrix pixel, we turned to fabricate organic active-matrix pixel with memory effect. Such pixel contains one PLED, two OTFT, and one storage capacitor. This designed circuit can reduce driving current and increase the operation life-time of polymer electro-luminescence materials. We successfully demonstrated the integration of two OTFT and storage capacitor on one substrate. In the pulse operation, 2T1C circuit can supply continuous output current, and let PLED sustaining brightness.

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