研究生: |
曾國晏 Tseng, Kuo-Yen |
---|---|
論文名稱: |
含雙載子調制層之高效率深藍光有機發光二極體 High-Efficiency Deep-Blue Organic Light-Emitting Diode with Two Carrier Modulation Layers |
指導教授: |
周卓煇
Jou, Jwo-Huei |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
工學院 - 材料科學工程學系 Materials Science and Engineering |
論文出版年: | 2010 |
畢業學年度: | 98 |
語文別: | 中文 |
論文頁數: | 89 |
中文關鍵詞: | 有機發光二極體 、深藍光 、高效率 |
相關次數: | 點閱:2 下載:0 |
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本研究製備出高亮度、高效率之深藍有機發光二極體,其高亮度以及高效率乃是藉由載子調制層1,1-bis[(di-4-tolylamino) phenyl]cyclohexane (TAPC)的使用而達成,特別是使用雙層載子調制層達成;當此元件未使用載子調制層時,其最大亮度為5,250 cd/m2 ;接著,若於元件之電洞傳輸層與發光層間,加入一層10 nm之載子調制層時,元件亮度提升至7,620 cd/m2;最後,再加入ㄧ2 nm同樣之載子調制材料於發光層中時,則亮度可高達9,130 cd/m2;未使用載子調制層之元件,其在亮度100 與1,000 cd/m2下,能量效率分別為3.5 與1.7 lm/W;使用單一載子調制層時,則分別為4.0與2.1 lm/W;使用上述雙載子調制層時,可分別達到3.9與2.2 lm/W;亮度顯著之提升,可能歸因於在元件中加入兩層載子調制的材料,有效形成更寬的載子覆合區域(carrier recombination zone);元件之高效率,可歸因於以下兩點:(ㄧ) 使用具高電洞傳輸性之TAPC,使元件有一低的驅動電壓,(二) 良好的元件結構設計,有效將進入發光層中的載子侷限住,亦即,使電子-電洞的覆合區域,侷限於發光層中,進而導致高的載子再結合機率。
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