研究生: |
江伯軒 Po-Hsuan Chiang |
---|---|
論文名稱: |
免電洞傳輸層之高效率藍光有機發光二極體 Hole-transporting-layer-free High-efficiency Fluorescent Blue Organic Light-emitting Diodes |
指導教授: |
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: | 73 |
中文關鍵詞: | 高效率 、免電洞傳輸層 、有機發光二極體 |
相關次數: | 點閱:3 下載:0 |
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本研究研製出免用電洞傳輸層之藍光有機發光二極體(Organic Light Emitting Diode,OLED);其中,發光層所用之淺藍及藍光發光分子分別為trans-1,2-bis(6-(N,N-di-p-tolylamino)naphthalene-2-yl) ethane(BNE)以及2-(N,N-diphenylamino)-6-[4-(N,N-diphenylamino)- styryl]naphthalene(DPASN);此元件結構為:導電陽極indium tin oxide(1250Å)/藍光發光層(300Å)/電子傳輸層1,3,5-tris(N-phenyl- benzimidazol-2-yl)benzene(400Å)/電子注入層lithium fluoride(10Å)/導電陰極aluminum(1500Å);研究發現,使用淺藍色BNE時,驅動亮度10 cd/m2所需之電壓為2.7伏特;在100 cd/m2時,其能量效率為12.5 lm/W,光色座標為(0.18, 0.33);使用藍色DPASN時,驅動電壓為3.0伏特,能量效率6.7 lm/W,光色座標(0.15, 0.20);此元件獲致高效率的原因為:一、使用高自發光性之發光材料BNE以及DPASN,二、有較薄之元件結構,三、電洞由ITO注入發光層之能障為零,使電洞容易注入發光層;同時,電洞可有效侷限在發光層,等待電子進入發光層後,再結合放光。
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