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研究生:巫明勳
研究生(外文):Ming-Syun Wu
論文名稱:摻雜式白光有機發光二極體之效能提昇研究
論文名稱(外文):Performance Improvement of White Organic Light-Emitting Diodes with Doped structures
指導教授:林堅楊林堅楊引用關係
指導教授(外文):Jian-Yang Lin
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:電子與光電工程研究所碩士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2013
畢業學年度:101
語文別:中文
論文頁數:108
中文關鍵詞:顏色穩定性發光效率多層摻雜結構白光有機發光二極體
外文關鍵詞:Emission efficiencyColor stabilityWhite organic light-emitting diodesMultilayer-doped structure
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本論文主要針對高效率白光有機發光二極體進行研究。首先,以非摻雜、一般摻雜、及多層摻雜發光層結構進行光電特性之比較。結果發現,多層摻雜結構之發光強度及發光效率等光電特性都優於其他結構,其結構可以有效的限制載子傳輸,並達到載子平均復合的效果,並且在有效的能量轉移下,使白光有機發光二極體元件的發光效率和顏色穩定性都有很好的效果。本研究利用多層摻雜的發光層結構,並藉由控制摻雜層數,可得到最佳的發光效率,其結構為:ITO/NPB(50nm)/{MADN(5nm)+[MADN:0.33%TBRb(6.25nm)]*8+MADN(5nm)}/Alq3(15nm)/LiF(1nm)/Al(120nm),此研究在摻雜濃度為0.33%時,可以有效的平衡藍光強度與黃光強度,並且得到接近白光之CIE座標值,其座標為(0.33, 0.38),而最大發光強度為10400 cd/m2,最大電流效率為6.13 cd/A。
This work has investigated on high-efficiency white organic light-emitting diodes (WOLEDs). First, we have compared the non-doped, conventionally doped, and multilayer-doped structures for the WOLEDs. Our results show that the multilayer-doped structure has better emission performance than the other structures. The quantized energy bands of the multilayer-doped emitting layer facilitate the electron and hole carriers to recombine in balance so that the emission properties of the WOLED can be improved. Both the emission efficiency and color stability are increased with effective energy transfer in the multilayer-doped emitting structure. In this work, the optimum WOLED structure with multilayer-doped emission layer is ITO/NPB(50nm)/{MADN(5nm)+[MADN:0.33%TBRb(6.25nm)]*8+MADN(5nm)}/Alq3(15nm)/LiF(1nm)/Al(120nm). When the doping concentration is 0.33%, it can effectively balance the intensity of blue and yellow light, and obtain the CIE coordinates of (0.33, 0.38) with a maximum luminance of 10400 cd/m2 and a maximum current efficiency of 6.13 cd/A.
摘要 i
ABSTRACT ii
誌謝 iii
目錄 iv
表目錄 v
圖目錄 vi
第一章 緒論 1
1-1 有機發光二極體之研究背景 1
1-2 有機發光二極體之研究目的 4
1-3 有機發光二極體之研究重要性 5
1-4 有機發光二極體之國內外發展現況 6
第二章 有機發光二極體基本理論與相關發展 18
2-1 有機發光二極體之發光原理 18
2-2 有機發光二極體之能量轉移原理 19
2-3 有機發光二極體之材料特性 21
2-4 有機發光二極體之光電特性 24
2-5 全彩化OLED技術 26
2-6 重要參考文獻之評述 27
第三章 研究方法與實驗步驟 47
3-1 實驗流程 47
3-2 儀器介紹 49
3-3 實驗材料之種類與規格 51
第四章 結果與討論 55
4-1 非摻雜、一般摻雜、多層摻雜對元件之影響 55
4-2 雙層結構不同發光層厚度對元件之影響 57
4-3 雙層結構不同摻雜濃度對元件之影響 58
4-4 不同客體摻雜層數對元件之影響 60
4-5 不同電洞傳輸層厚度對元件之影響 62
4-6 不同電子傳輸層厚度對元件之影響 63
4-7 多層結構不同摻雜濃度對元件之影響 65
第五章 結論 94
參考文獻 95
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