研究生: |
林雨樸 Yu-Pu Lin |
---|---|
論文名稱: |
高效率深藍光有機發光二極體之研製 Fabrication Study of High Efficiency Deep-Blue Organic Light Emitting Diode |
指導教授: |
蔡哲正
Cho-Jen Tsai 周卓煇 Jwo-Huei Jou |
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: | 2008 |
畢業學年度: | 96 |
語文別: | 中文 |
論文頁數: | 58 |
中文關鍵詞: | 有機發光二極體 、深藍光 、高效率 |
外文關鍵詞: | OLED, deep-blue, High-efficiency |
相關次數: | 點閱:2 下載:0 |
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本研究係使用一新穎藍光發光材料2,7-bis{2[phenyl(m-tolyl) amino]-9,9-dimethyl-fluorene-7-yl}-9,9-dimethyl-fluorene (MDP3FL),摻雜於一低極性的主體材料4,4’-bis(9-carbazolyl)-biphenyl (CBP)作為發光層,製備出兼具高效率與深藍光之有機發光二極體(OLED);掺雜量為10 wt %時,元件光色極為深藍,在亮度100 cd/m2 下,其色座標(Commission Internationale de l’Eclairage coordinates, CIE (x,y)) 為 (0.14, 0.08),元件之外部量子效率(external quantum efficiency) 高達5.1%;元件之深藍光光色,應是由於主體與客體發光材料,兩者皆屬低極性分子,因極性相似,使得在掺混時,客體材料可以被有效分散於主體材料之間,使發光層中的主客體,產生良好的固溶效應(solid-state solvation),而發出較為深藍的光色;元件之高效率,應是由於元件結構之設計,有利載子注入到主體,在主體上形成激子(excitons),避免激子在客體上形成,發生導致效率降低的激子淬息效應(exciton quenching effect);同時,主體與客體間有效的能量傳遞(energy transfer),可使客體有效率的發光,進而增加元件效率。
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