| 摘要: | 有機發光材料製備的有機發光二極體(OLED)由於在平面顯示器與光電元件上優越的特性與有潛力的應用，而比無機發光二極體更吸引世人的注目。有機發光二極體具有獨特的優點，包括可撓性、質輕、全彩性、高發光效率、元件穩定性、廣視角、低成本與低耗能，符合未來顯示器產業「輕、薄、短、小、省、彩、美、多」的發展趨勢。總結目前有機發光二極體在工業生產上主要有兩各瓶頸：(1) 元件有機氣相沉積製程中與操作外加電壓時所產生的高溫；(2) 缺乏對於材料與元件穩定與壽命上界面工程的有效控制。首先，藉由初步溶液篩選，不只是材料的純化與分離，還可在這單元操作中一次得到溶解度、同質異相、晶貌與結晶度。此外，完成8-羥基喹啉鋁(Alq3)的form space作為有用的工程量產資料庫。由二甲基甲醯胺(DMF)再結晶的Alq3具有較低的昇華點，可提供OLED製程中較低的蒸鍍溫度。其次，發展生長於二維基板上Alq3奈米線的界面研究與篩選，包括在生物組織薄膜(例如蛋膜)與自組裝層的生物啟發界面(具甲基官能基的1-Undecanethiol (UDT)與羧基官能基的 11-Mercaptoundecanoic acid ( MUA )。其單一步驟的奈米線製備的單元操作經濟且有效率。此外，以有機生物組織膜與仿生薄膜做為模板來誘發有機奈米線的方法新穎且獨特。本界面研究釐清了材料在模板上的成核與成長，並預防了元件的降解機制。在另一方面，它亦提供了未來在各領域面的可能元件與潛力應用上的優越改良與強化。我們研究Alq3除了因為它為一廣泛用於有機發光二極體的有機螢光材料外，還由於其豐富的相關研究文獻。 The organic light-emitting diodes (OLEDs) based on organic materials are fascinating due to their attractive characteristics and potential applications to flat panel displays and illumination devices over inorganic materials. The OLEDs have unique advantages including flexibility, light weight, colorful gamut, high fluorescence efficiency, device reliability, wide view angle, low economical- and energetic-consuming. In summary, there are two main bottlenecks on the mass production of OLEDs: (1) The high temperature brought about by the deposition method (Organic Vapor Phase Decomposition, OVPD) and the operation (applied driving voltage). (2) An effective control in the stability and lifetime by interfacial engineering. Firstly, via initial solvent screening, not only separation and purification, but also solubility, polymorphism, crystal habit, and crystallinity were available in one-step unit operation. In addition, the form space of Alq3 was established as an useful engineering mass-productive data bank. The depression of sublimation point for Alq3 re-crystallized from DMF offered a lower evaporation temperature of OLED fabrications. Secondly, the interfacial study and screening of Alq3 nanowires grown on 2-dimensional templates including biological membranes (such as eggshell membranes ) and bio-inspired interfaces with mixed SAMs (1-Undecanethiol (UDT) and 11-Mercaptoundecanoic acid( MUA ) having methyl (CH3) and carboxyl (COOH) functional group were developed. The one-step unit operation of nanowires fabrication was efficient and economical. Besides, the organic biological and biometric membranes served as templates to induce organic nanowires were novel and unique. The interfacial study realized the nucleation and growth of materials on templates and avoided the degradation mechanism of devices. On the other hand, it also provided a strong improvement and enhancement of devices and potential applications on various fields in the future. Tris(8-hydroxyquinolinato)aluminum(Alq3) was an extensive organic emitting materials for OLEDs manufacturing and was selected for our investigation because of the rich literatures. |
