白光磷光有機發光二極體之研究

The study of white phosphorescent organic light-emitting diodes

劉祐宏(You-Hong Liu)

指導教授 ： 蘇水祥

義守大學/智慧科技學院/電子工程學系/碩士(2021年)

摘要

本研究將藍光磷光銥錯合物iridium(III) bis[(4,6-di-fluorophenyl)-pyridinato-N,C2'] (FIrpic) 及紅光磷光銥錯合物Bis(1-phenylisoquinoline)(acetylacetonate)iridium(III) (Ir(piq)2(acac)) 分別摻雜於小分子磷光主體N,N′-Dicarbazolyl-3,5-benzene (mCP)與2,2',2"-(1,3,5-Benzinetriyl)-tris(1-phenyl-1-H-benzimidazole) (TPBi) 中，製作出白光磷光有機發光二極體(White PHOLED)。藍光磷光客體材料(FIrpic)之EL頻譜波峰位於472 nm，紅光磷光客體材料(Ir(piq)2(acac)) 之EL頻譜波峰位於630 nm，藉由優化藍光、紅光雙發光層及電荷控制層參數，提升白光磷光有機發光二極體之發光效率。
本研究探討FIrpic摻雜於mCP之濃度參數，也探討Ir(piq)2(acac) 摻雜於TPBi之濃度參數，並於雙發光層中加入不同厚度的電荷控制層，研究激子複合區對元件光電特性的影響。
實驗結果顯示在優化客體材料摻雜濃度與電荷控制層厚度下，製作出白光磷光有機發光二極體，元件結構為ITO/MoO3(1 nm)/NPB(40 nm)/mCP(10 nm)/mCP:FIrpic(20 nm, 10 wt%)/mCP(0.8 nm)/TPBi(2.2 nm)/TPBi:Ir(piq)2(acac) (10 nm, 2 wt%)/TPBi(30 nm)/LiF/Al，元件最大亮度為11084 cd/m2，最大效率為18.97 cd/A，CIE座標為(0.327, 0.338)。

關鍵字

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並列摘要

In this study, we fabricate white phosphorescent organic light-emitting diode (white PHOLEDs) by using blue phosphorescent iridium complex iridium(III) bis[(4,6-di-fluorophenyl)-pyridinato-N,C2'] (FIrpic) and red phosphorescent iridium complex Bis(1-phenylisoquinoline)( acetylacetonate)iridium(III) (Ir(piq)2(acac)) to dope into small molecule phosphorescent host N,N′-Dicarbazolyl-3,5-benzene (mCP) and 2,2',2"-(1 ,3,5-Benzinetriyl)-tris(1-phenyl-1-H-benzimidazole) (TPBi), respectively.
The EL spectrum peak of the blue phosphorescent guest material (FIrpic) located at 472 nm, and that of the red phosphorescent guest material (Ir(piq)2(acac)) located at 630 nm.
Varying the doping concentration of FIrpic in mCP, Ir(piq)2(acac) in FIrpic, and the thickness of charge control layers , the luminous efficiency of white PHOLEDs were studied and optimized.
The experimental results show that optimizing doping concentration of FIrpic in mCP, Ir(piq)2(acac) in FIrpic, and the thickness of charge control layers, the white PHOLED, have been successfully fabricated with the structure of ITO/MoO3(1 nm)/NPB(40 nm)/mCP(10 nm)/mCP:FIrpic(20 nm, 10 wt%)/mCP(0.8 nm)/TPBi(2.2 nm)/TPBi:Ir (piq)2(acac) (10 nm, 2 wt%)/TPBi(30 nm)/LiF/Al. The optimal luminance of white PHOLED is 11084 cd/m2, the luminous efficiency is 18.97 cd/A, and the CIE coordinates are (0.327, 0.338).

並列關鍵字

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參考文獻

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