以短激態生命期及高量子產率之新穎銥錯合物旋塗製備高效率綠磷光有機發光二極體

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研究生：	鐘于喬 Yu-Chiao Chung
論文名稱：	以短激態生命期及高量子產率之新穎銥錯合物旋塗製備高效率綠磷光有機發光二極體 High-Efficiency Solution-Processed Phosphorescent Green Organic Light-Emitting Diode Using a Short-Excited-State-Lifetime and High-Quantum-Yield Iridium Complex
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：	74
中文關鍵詞：	激態生命期、量子產率、銥錯合物、旋塗製程、高效率、有機發光二極體
相關次數：	點閱：4 下載：0
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本研究成功製備了一可旋塗高效率綠磷光有機發光二極體（Organic Light-Emitting Diode, OLED），此OLED乃使用ㄧ可濕式製作，且具備短激態生命期(excited-state lifetime, 0.30 μs)及高量子產率
(quantum yield, 95%)之新穎銥錯合物bis[5-methyl-7-trifluoromethyl-
5H-benzo(c)(1,5)naphthyridin-6-one]iridium(picolinate)（CF3BNO）；以此CF3BNO染料搭配主體材料4,4’-bis(9-carbazolyl)biphenyl，製備綠光OLED元件時，其能量效率，在100 cd/m2下，達70 lm/W，Commission internationale de l'éclairage 1931色座標為（0.22, 0.51）；除了此綠磷光材料光激發光特性優異外，此元件之高效率，也可歸因於適當的結構能階設計，讓電子傾向直接注入到主體材料上，使電子電洞在主體上進行再結合，形成激子；再藉由能量傳遞的方式，傳導到客體CF3BNO；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。

獻................................................................................................................I
摘要...........................................................................................................II
致謝..........................................................................................................III
目錄..........................................................................................................VI
表目錄......................................................................................................IX
圖目錄.......................................................................................................X
壹、    緒論..................................................................................................1
貳、    文獻回顧..........................................................................................4
2-1 有機發光二極體的歷史發展........................................................4
2-2 發光原理......................................................................................11
2-2-1 能量轉移機制...................................................................15
2-2-2 OLED的驅動電流............................................................18
2-3 OLED所使用之有機材料............................................................21
2-3-1 有機發光材料...................................................................21
2-3-2 電洞傳輸層材料...............................................................24
2-3-3 電子傳輸層材料...............................................................25
2-3-4 電極材料...........................................................................26
2-4、高效率OLED元件之發展........................................................26
2-4-1 綠磷光材料開發...............................................................27
2-4-2 元件結構設計.................................................................. 28
2-4-3不同製程之高效率綠磷光件............................................29
參、    實驗方法........................................................................................32
3-1 材料..............................................................................................32
3-1-1 CF3BNO之合成.................................................................34
3-1-2 BNO之合成.......................................................................35
3-2 材料性質量測..............................................................................36
3-2-1 量子產率（quantum yield）之量測................................36
3-2-2 激態生命期（excited-state lifetime）之量測..................37
3-3-3 材料分解溫度（decomposition temperature）之量測....38
3-3-4 光激發光光譜（Photoluminescent spectrum, PL spectrum）之量測..............................................................................39
3-3-5 紫外光吸收光譜（ultraviolet visible absorption, UV-Vis absorption）之量測..........................................................39
3-3-6 最高已填滿分子軌域（highest occupied molecular orbital, HOMO）及最低未填滿分子軌域（lowest unoccupied molecular orbital, LUMO）之量測...................................39
3-4 元件設計及製備..........................................................................40
3-4-1 元件之電路設計...............................................................40
3-4-2 基材清洗...........................................................................42
3-4-3 主體與發光染料溶液之配製...........................................42
3-4-4 旋轉塗佈...........................................................................43
3-4-5 蒸鍍裝置...........................................................................45
3-4-6 負電極的製備...................................................................45
3-4-7 元件結構...........................................................................45
3-4-8 蒸鍍速率之測定與校正...................................................46
3-5 元件電流、電壓與亮度特性量測..............................................47
3-5-1 發光效率之計算...............................................................49
肆、    結果與討論....................................................................................50
4-1、新穎綠磷光材料之物理性質......................................................50
4-2、以濕式製程製備綠磷光元件......................................................51
4-3、以乾式製程製備綠磷光元件......................................................56
4-4、製程及客發光體對元件光電特性之影響..................................60
4-5、製程對元件效率之影響..............................................................61
4-6、材料特性對元件效率之影響......................................................63
4-7、能階結構對效率之影響..............................................................64
伍、    結論................................................................................................66
陸、    參考文獻........................................................................................68
附錄、個人著作........................................................................................73

                                

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