請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/77971
標題: | 應用新穎藍光熱激活化延遲螢光材料之高效率藍光及白光有機發光元件 Efficient Blue and White Organic Light-Emitting Diodes Based On Advanced Blue-Emitting Thermally Activated Delayed Fluorescent Emitter |
作者: | Ting-An Lin 林庭安 |
指導教授: | 吳忠幟 |
關鍵字: | 有機發光元件,白光有機發光元件,熱激活化延遲螢光,水平電偶極矩, OLEDs,white OELDs,thermally activated delayed fluorescence,dipole orientations, |
出版年 : | 2017 |
學位: | 碩士 |
摘要: | 有機發光二極體已被視為重要的顯示技術與照明技術,所以元件效率備受重視,尤其藍光與白光元件是近期在學術研究上探討的重點。因此在本篇論文中,我們針對新穎的熱激活化延遲螢光材料做光物理與電性上的分析,並進一步製作高效率的藍光與白光有機發光元件。
在論文的第一部份,我們針對新穎的acridine-triazine系列材料進行光物理的分析,得知它們為高效率的熱激活化延遲螢光(TADF)藍光發光材料。其中SpiroAC-TRZ具有接近理想的100%量子效率(PLQY)和很高的水平偶極方向性(horizontal dipole ratio)。在仔細優化元件的電性及光學特性下,製成的藍光元件其外部量子效率可高達37%,是目前熱激活化延遲螢光有機發光元件及各種藍光有機發光元件當中,效率最高的紀錄。 第二部分我們利用SpiroAC-TRZ很好的藍光光物理以及元件特性,將SpiroAC-TRZ與其他紅光的磷光有機發光材料同時摻雜在單一發光層中,製作出外部量子效率超過32%的白光有機發光元件。 Organic light-emitting diodes (OLEDs) have become an important technology for display and lighting applications. To enhance OLED performances for various applications, continuously improving efficiencies of blue and white OLEDs (WOLEDs) is critical. In this thesis, we focused on the investigation of high performance organic light-emitting materials and device architectures based on thermally activated delayed fluorescence (TADF). In the first part, we investigated detailed photophysical properties of molecular materials based on the acridine-triazine hybrid. Our studies indicate they are highly efficient TADF emitters. Therein, SpiroAC-TRZ has unitary photoluminescence quantum yield (PLQY) and strongly horizontally oriented emitting dipoles simultaneously. It can be used to fabricate extremely efficient blue OLED with external quantum efficiency (EQE) of nearly 37%, by far the highest ever reported for TADF OLEDs and for all kinds of blue OLEDs. In the second part, we develop WOLEDs based on the extremely efficient blue OLED by incorporating SpiroAC-TRZ and other red phosphorescent emitters into a single-emitting layer (S-EML) device architecture. With the promising characteristics of SpiroAC-TRZ, WOLEDs with EQE exceeding 32% were obtained. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/77971 |
DOI: | 10.6342/NTU201701688 |
全文授權: | 有償授權 |
顯示於系所單位: | 電子工程學研究所 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-106-R05943055-1.pdf 目前未授權公開取用 | 2.48 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。