白光有機發光二極體之發光層製作技術

The fabrication of White Organic Light Emitting Diodes

黃智群(Jhih-Cyun Huang)

指導教授 ： 莊賦祥

國立虎尾科技大學/電機資訊學院/光電與材料科技研究所/碩士(2009年)

摘要

第一部份、探討白色磷光有機發光二極體之最佳化結構與濃度在發光效率與亮度的改善，製作一系列具單一發光層三波段白光之有機電致發光元件，元件基本結構如下Glass-ITO/ PEDOT：PSS/EML/ BAlq/Alq3/LiF/Al，其發光層(EML)選用磷光發光材料之客發光體於藍光FIrpic 綠光Ir(ppy)3 紅光Ir(piq)2(acac)掺混在主發光體CBP中，且溶於甲苯溶液內。本研究調變激子阻擋層BAlq與電子傳輸層Alq3之厚度可以有效提升效率且更趨近於白光，主發光體CBP濃度與摻雜濃度之調變，可以再提升亮度與效率至4cd/A，亮度5500cd /m2@12V。
第二部分、元件在製程上使用熱蒸鍍的方式，其發光層選用螢光之材料，元件結構Glass-ITO/ NPB/EML/Alq3/LiF/Al，本研究首先最佳化藍光結構將亮度提升至6500cd/m2@9V、效率約1.8cd /A，再使用藍光摻雜材料(ADS080BE)摻雜至藍光主發光體(ADS082BE)中，大幅提升亮度至10000cd/m2@ 9V、效率2.7 cd/A，並大幅改善色偏情況，最後加入互補光之橙光發光層，結合藍光與橙光而成白光，亮度在15600cd/m2 @9V時效率有4.9cd/A之高穩定性白光發光二極體。

關鍵字

白光有機發光二極體

並列摘要

In this study, guest emitting materials (blue: FIrpic, red: Ir(piq)2(acac) and green: Ir(ppy)3) and host emitting material (CBP) were dissolved in toluene solvent to form a single emission layer of white organic light emitting diode (WOLED). We discussed the influence of optimization structure and EML solution concentrations to device performances. From the results, the WOLED has better luminance (3500 cd/m2) and efficiency (2.4 cd/A) with the optimal thicknesses of HBL (BAlq) and ETL (Alq3), the CIE value is (0.33,0.349). Finally, the device luminance and efficiency can be improved to 5500 cd/m2 and 4 cd/A when the dissolved time of EML solution and doped concentrations of guest emitting materials (red: Ir(piq)2(acac) and green: Ir(ppy)3) optimization.

並列關鍵字

White Organic Light Emitting Diodes ； WOLED

參考文獻

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