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研究生: 張勤業
Chin-Yeh Chang
論文名稱: 以接觸印刷製備有機發光二極體
Contact-Printed Organic Light-Emitting Diode
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: 45
中文關鍵詞: 有機發光二極體接觸印刷
外文關鍵詞: OLED, contact printing
相關次數: 點閱:3下載:0
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  • 本研究提出一種新穎有機發光二極體(organic light-emitting diode,OLED)製造方法,其乃利用接觸印刷,將發光材料轉印至元件上,成功製備出紅、綠、藍光色OLED元件;所選用的紅色發光層材料為:主體材料4,4’-bis(9-carbazolyl)-biphenyl (CBP) 摻混紅光染料bis(2-(2’-benzo[4,5-a]thienyl)pyridinato-N,C3’) iridium(acetylacetonate);綠色發光層為:主體材料CBP摻混綠光染料fac tris-(2-phenylpyridine) iridium;藍色發光層則為:免用主體之藍色發光材料trans-1,2-bis(6- (N,N-di-p-tolylamino)-naphthalene-2-yl)ethene;各元件所搭配之電洞注入材料為:poly(3,4-ethylene-dioxythiophene)-poly-(styrenesulfonate) (PEDOT:PSS),電子傳輸材料為:1,3,5-tris(N-phenylbenzimidazol-2-yl) benzene (TPBi);所得元件結構為:透明導電陽極銦錫氧化物/電洞注入層PEDOT:PSS/發光層/電子傳輸層TPBi/電子注入層氟化鋰/陰極鋁;目前所得各元件之最大亮度,分別為紅光的45、綠光的332與藍光的48 cd/m2。


    目錄 摘要.......................................................I 獻........................................................II 致謝.....................................................III 目錄......................................................VI 表目錄....................................................IX 圖目錄.....................................................X 壹、 緒論...............................................1 貳、 文獻回顧...........................................3 2-1、有機發光二極體之發光原理..........................3 2-2、有機發光二極體之歷史發展..........................4 2-2-1、早期發展....................................4 2-2-2、元件結構之改良..............................7 2-3、有機發光二極體之製造方法.........................11 2-3-1、真空蒸鍍法.................................11 2-3-2、旋轉塗佈法.................................13 2-3-3、噴墨印刷法.................................13 2-4、接觸印刷技術.....................................15 2-4-1、接觸印刷介紹及原理.........................15 2-4-2、印模性質...................................16 2-4-3、接觸印刷於有機發光二極體之應用.............16 參、 實驗方法..........................................19 3-1、材料.............................................19 3-2、印模製備.........................................21 3-3、轉印墨水之配製...................................22 3-4、OLED元件製備.....................................23 3-4-1、ITO玻璃基板蝕刻............................23 3-4-2、ITO玻璃基板清洗............................23 3-4-3、旋轉塗佈電洞注入層.........................24 3-4-4、接觸印刷製備OLED元件之發光層...............24 3-4-5、真空蒸鍍...................................25 3-5、元件之電路設計...................................27 3-6、元件電流與亮度特性量測...........................29 肆、 結果與討論........................................30 4-1、轉印墨水之選擇與性質探討.........................30 4-2、氧氣電漿處理對印模表面潤濕性之影響...............32 4-3、上墨方式對薄膜均勻性之影響.......................34 4-4、轉印參數對轉印效果之影響.........................35 4-5、接觸印刷製備紅、綠、藍光色OLED元件...............36 4-5-1、元件結構...................................36 4-5-2、旋轉塗佈及轉印參數對元件效能表現影響.......36 伍、 結論..............................................40 陸、 參考資料..........................................41 附錄、個人著作目錄........................................45 表目錄 表一、本研究選用之有機材料化學式與簡稱....................19 表二、實驗選用溶劑之特性..................................30 表三、藍光發光材料BNE於所選溶劑中之溶解情形...............31 表四、紅色與綠色發光層組成於各式溶劑中之溶解情形..........32 表五、旋塗及轉印參數對OLED元件亮度表現之影響..............38 圖目錄 圖一、OLED元件結構.........................................3 圖二、OLED發光原理示意圖...................................4 圖三、1987年美國柯達公司發表之異質接面雙層OLED元件結構.....6 圖四、1989年美國柯達公司發表之摻混式OLED元件結構...........8 圖五、Saito研究團隊提出載子再結合區域位於具電洞傳輸功能的發 光層上之元件結構...........................................9 圖六、1991年Saito研究團隊提出之三層OLED元件結構............9 圖七、1993年Kido團隊提出之幽禁式元件結構..................10 圖八、真空蒸鍍有機薄膜之示意圖............................12 圖九、(a)點型及(b)線型蒸鍍源之比較........................12 圖十、旋轉塗佈有機薄膜之示意圖............................14 圖十一、噴墨印刷製備全彩化OLED............................14 圖十二、熱輔助接觸印刷轉印電洞阻擋材料....................17 圖十三、熱輔助接觸印刷轉印PEDOT:PSS至ITO玻璃上之成果......18 圖十四、本研究選用有機材料之化學結構式....................20 圖十五、PDMS印模製備流程圖................................21 圖十六、轉印機台示意圖....................................25 圖十七、真空蒸鍍系統......................................26 圖十八、OLED元件之電路設計................................28 圖十九、OLED元件之電流-電壓-亮度量測示意圖................28 圖二十、墨水液滴在經氧氣電漿處理前後印模表面之分散情形....33 圖二十一、PDMS印模經氧氣電漿處理後表面潤濕效果示意圖......33 圖二十二、本研究製備之OLED元件結構圖......................37 圖二十三、發光與未發光藍色OLED元件之電流密度比較..........39

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