研究生: |
邱永昇 Yung-Sheng Chiu |
---|---|
論文名稱: |
高效率高光色安定性螢光白光有機發光二極體之研製 Fabrication Study of High-efficiency and Color-stable Fluorescent White Organic Light-emitting Diodes |
指導教授: |
周卓煇
Jwo-Huei Jou |
口試委員: | |
學位類別: |
博士 Doctor |
系所名稱: |
工學院 - 材料科學工程學系 Materials Science and Engineering |
論文出版年: | 2005 |
畢業學年度: | 94 |
語文別: | 中文 |
論文頁數: | 193 |
中文關鍵詞: | 有機發光二極體 、白光元件 、高效率 、光色安定 、螢光 |
外文關鍵詞: | organic light-emitting diodes, white-light device, high-efficiency, color-stable, fluorescence |
相關次數: | 點閱:3 下載:0 |
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利用薄層元件結構、適當之元件能階設計、選用高發光效率之紅、藍綠光染料,及能量轉移效率極佳之藍光主體材料,以溶劑預溶混合均勻之主、客發光材料混合物為源蒸鍍,我們製備了一系列高效率、高光色安定性螢光白光有機電致發光二極體(White Organic Light- Emitting Diode, WOLED);所用主體材料為1,4-bis(2,2-diphenylvinyl)biphenyl、1-tert-butyl-9,10-bis(2-naphtyl)anthracene、藍綠光染料di(tri-phenylamine)-1,4-divinylna-phthalene、綠光染料10-(2-benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H,11H-(1)benzopyrano(6,7,8-l,j)quinolizine-11-one、紅光染料4-(dicyanomethylene)-2-methyl-6-(julolidin-4-yl-vinyl)-4H-pyran;所搭配的電洞傳輸材料為N,N’-bis-(1-naphthy)-N,N’diphenyl-1,1’-biphenyl4-4’-diamine,電子傳輸材料為1,3,5-tris(N-phenylbenzimidazol-2-yl)benzene;所得元件結構使電子、電洞容易進入發光層中,更可藉由高能量轉移效率的主體材料,將激態能量有效轉移至客發光分子,而得高發光效率;另外,所得摻雜染料分佈均勻之單一發光層,加上前述適當之元件結構,使電子、電洞容易被侷限在此發光層中再結合發光,不易因施加電壓變化而偏移至其他非發光層,故可得高光色安定性;所得三波長WOLEDs元件中,最大發光效率可達16 lm/W或19.2 cd/A,在元件亮度為100 cd/m2時,其1931國際照明標準委員會(Commission International de L’Eclairage,CIE)色座標為(0.359, 0.427),此元件最大發光亮度可達56,000 cd/m2;所得雙波長純白光WOLEDs元件中,發光效率最高者,可達6.6 lm/W或9.6 cd/A,在元件亮度為100 cd/m2時,其CIE色座標為(0.346, 0.343);所得三波長純白光WOLEDs元件中,效率最高者達5.9 lm/W或8.5 cd/A,在元件亮度為100 cd/m2時,其CIE色座標為(0.339, 0.359);所得各式白光或純白光WOLED元件,在亮度從100 cd/m2變化至10,000 cd/m2時,其所得CIE色座標變化,均小於(0.03, 0.03)。
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