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研究生:游仁州
研究生(外文):Jen-Chou Yu
論文名稱:使用藍光共主體製作高效率螢光白光有機發光二極體之研究
論文名稱(外文):The Investigation on the High-efficiency Fluorescent White Organic Light-emitting Diodes Using Mixed-host Structure
指導教授:朱聖緣朱聖緣引用關係
指導教授(外文):Sheng-Yuan Chu
學位類別:碩士
校院名稱:國立成功大學
系所名稱:電機工程學系碩博士班
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:2009
畢業學年度:97
語文別:中文
論文頁數:100
中文關鍵詞:有機發光二極體共主體白光
外文關鍵詞:white organic light-emitting diodesOLEDco-hosthigh-efficiency
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在本研究中,我們利用發光層共主體結構製作白光OLED元件,以溶劑預先混合各發光主體、摻雜客體,製備好發光層蒸鍍源;首先,我們改變不同NPB摻雜濃度,製作一系列藍光OLED,探討摻雜比例對元件之光、電特性與發光光色之影響;其次,以此共主體結構,製作單層發白光OLED元件。本實驗使用之材料有:電洞傳輸材料 4,4-bis[N-(1-naphthyi)-N-phenyl-amino]-biphenyl (NPB),發光層之主體材料(4,4’Bis[2,2-di(4-methylphenyl)-ethen-1-yl]biphenyl) (p-DMDPVBi) 與4,4-bis[N-(1-naphthyi)-N-phenyl-amino]-biphenyl (NPB),以及摻雜橘黃光染料(5,6,11,12)-Tetraphenylnaphthacene (Rubrene),電子傳輸兼電洞阻擋層材料2-2’-2”-(1,3,5-benzinetriyl)tris(l-phenl-1-H-benzimidazole) (TPBi)。
本實驗可獲得之元件特性數據有:藍光元件驅動電壓2.8 V;最大效率5.18 cd/A,在亮度100 cd/m2與900 cd/m2時,CIE座標為 (0.164, 0.161)與 (0.164, 0.160);而得到之雙波長白光元件,驅動電壓2.8 V;最大輝度20300 cd/m2;在1000 cd/m2與10000 cd/m2下,發光效率為10.511 cd/A與7.701 cd/A, CIE色度座標為 (0.29, 0.32) 與 (0.31, 0.34),為白光光色。本研究可提供OLED應用之基礎研究。
In this research, we fabricate a white organic light-emitting diode employed the mixed host in a single emissive layer. We mixed the different host materials and the doping material into a solvent to make up the thermal evaporation source of the emissive layer. First, we fabricated a series of blue OLEDs by adjusting the doping concentration of NPB, and discussed the characteristic and colors. The next, base on the co-host structure, we fabricated a single emissive layer white OLED. In this experiment, we use the 4,4-bis[N-(1-naphthyi)-N-phenyl-amino]-biphenyl (NPB) as the hole transport layer, the (4,4’Bis[2,2-di(4-methylphenyl)-ethen-1-yl]biphenyl) (p-DMDPVBi) and 4,4-bis[N-(1-naphthyi)-N-phenyl-amino]-biphenyl (NPB) as the host materials of the emissive layer, and the (5,6,11,12)-Tetraphenylnaphthacene (Rubrene) as the orange dopant. We use the 2-2’-2”-(1,3,5-benzinetriyl)tris(l-phenl-1-H-benzimidazole) (TPBi) as the electron transport layer and hole blocking layer.
The research attains the blue OLEDs characteristic data, turn on voltage (2.8 V) and the maxima efficiency (5.18 cd/A). At the 100 cd/m2 and 900 cd/m2, the CIE coordinate varies from (0.164, 0.161) to (0.164, 0.160). Also, in the white emission and attains the turn on voltage (2.8 V), the maxima luminance (20300 cd/m2). At the 1000 cd/m2 and 10000 cd/m2, the device efficiency are 10.511 cd/A and 7.701 cd/A, and the CIE coordinate are
(0.29, 0.32) and (0.31, 0.34), being the white color.
中文摘要.......................I
英文摘要.......................II
致謝.......................III
目錄.......................IV
表目錄.......................VI
圖目錄.......................VII
第一章 緒論.......................1
1-1 前言.......................1
1-2 實驗動機.......................3
第二章 理論基礎.......................5
2-1 螢光理論.......................5
2-2 有機發光二極體之發光原理.......................7
2-3 元件電流限制.......................8
2-4 有機發光二極體的結構.......................17
2-5 有機發光二極體材料.......................18
2-6 能量轉移機制.......................22
2-7 發光效率的定義與量測方法.......................24
2-8 白光有機發光二極體相關文獻.......................27
第三章 實驗步驟與方法.......................33
3-1 有機電激發光元件製程分類.......................33
3-2 真空熱蒸鍍系統設備(Thermal Evaporation System).......................33
3-3 實驗材料.......................34
3-4 蒸鍍源之製備.......................35
3-5 ITO基板前置處理之實驗步驟.......................35
3-6 真空蒸鍍之實驗步驟.......................37
3-7 單體沉積速率之測定.......................38
3-8 光致發光光譜之量測.......................38
3-9 紫外光吸收光譜之量測.......................39
3-10 OLED元件之電流、電壓與亮度關係曲線圖量測.......................39
第四章 結果與討論.......................40
4-1 高效率深藍光OLED元件.......................40
4-1-1 元件結構.......................40
4-1-2 元件之電流、電壓、亮度關係.......................41
4-1-3 元件能帶圖分析.......................42
4-1-4 元件發光效率.......................43
4-1-5 元件之電致激發光譜.......................44
4-1-6 元件CIE色度座標.......................46
4-2 高效率白光OLED元件.......................47
4-2-1 元件結構.......................47
4-2-2 元件之電流、電壓、亮度關係.......................48
4-2-3 元件能帶圖分析.......................48
4-2-4 元件發光效率.......................49
4-2-5 元件之電致激發光譜.......................50
4-2-6 元件CIE色度座標.......................52
第五章 結論與未來展望.......................54
5-1 結論.......................54
5-2 未來展望.......................55
參考文獻.......................56
附表.......................62
附圖.......................63
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