研究生: |
丘全煥 Chiu, Chuan-Huan |
---|---|
論文名稱: |
含雙發光層之高效率橘色磷光有機發光二極體 High-Efficiency Phosphorescent Orange Organic Light-Emitting Diode with Double Emission 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: | 2009 |
畢業學年度: | 97 |
語文別: | 中文 |
論文頁數: | 68 |
中文關鍵詞: | 有機發光二極體 、雙發光層 |
相關次數: | 點閱:2 下載:0 |
分享至: |
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本研究利用雙發光層結構,成功製造出一高效率橘色磷光有機發光二極體;第一發光層使用之主體材料為2,7-Bis(9-carbazolyl)-9,9- spirobifluorene (Spiro-2CBP)、第二發光層使用之主體材料4,4’-Bis(9-carbazolyl)-biphenyl (CBP),兩層發光層都摻雜4 wt%的橘光染料Tris(2-phenylquinoline)iridium(III) (Ir(2-phq)3);當第一與第二發光層的厚度分別為19與5 nm時,元件效能最佳,在亮度100 cd/m2下,能量效率為29.5 lm/W,CIE1931色座標為(0.56, 0.44);此元件之高效率可歸因於適當的能階結構設計,此能階結構具有以下兩項優點:(一)激子傾向於主體材料上形成,再藉由能量傳遞的方式,傳導到客體,同時較少的激子在客體形成,也避免了過多激子在主體上累積,所造成的淬熄現象(二)可使載子於Spiro-2CBP:Ir(2-phq)3/CBP:Ir(2-phq)3界面再結合,形成激子,再經由能量轉移,將激子能量,向兩邊的發光層傳遞,使得大部分激子能量被傳遞給客體,而非無染料摻雜的傳輸層。
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