利用磷光增感劑應用於p-i-n白光有機發光二極體 與封裝技術之研究

Development of phosphorescent sensitizer fluorescent p-i-n white OLEDs and its thin-film encapsulation technology

蕭智仁(Chih-Jen Hsiao)

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(2010年)

摘要

本研究利用磷光增感劑可作為高效率發光材料，因其擁有高效率及高能隙效應，故將磷光當作感光劑使用，並利用能量轉移 (triplet-singlet energy transferr)之優點，傳遞於較低能隙之螢光。基於上述本論文探討利用高效率之磷光綠光客發光體 (Ir(ppy)3)，分別將螢光紅光客發光體 (DCJTB)與螢光黃光客發光體 (EY53)，共摻雜於具有高能階 (CBP)主發光體中製作黃光發光層。為了提高元件的壽命，再搭配高效率螢光天藍光客發光體 (BUBD-1)摻雜於雙極性的螢光主發光體 (MADN)而得到寬頻譜的白光。該元件在20mA/cm2 電流之下效率為21 cd/A，最大外部量子效率為6.62%，色座標為(0.40,0.46)之白光。另外以p型摻雜物 (WO3) 和n型摻雜物 (Cs2CO3)分別摻雜於電洞傳輸層 (NPB)和電子傳輸層 (BPhen)當作p型電洞傳輸層和n型電子傳輸層，使元件電壓大幅降低而達到高效率及高亮度之白光有機發光二極體。另外針對軟性基板，製作出新穎封裝技術，在矽氧樹脂（PDMS）上沉積二氧化矽薄膜 (Silicon Oxide)，以提高抗水氧穿透率。此方法無需使用溶劑製作保護層，以達到成本低廉與簡單化之目標。

關鍵字

磷光增感劑 ； 白光有機發光二極體 ； 高色穩定性 ； 新穎封裝

並列摘要

In this study use phosphor-sensitizer can be used as high efficiency light-emitting materials, because it has high efficiency and high energy gap effect, and the phosphorscent as a sensitizer has advantages of using energy transfer, transfer to a lower energy gap of the fluorescence. This thesis is based on the high-efficiency green phosphorescent guest emitter (Ir(ppy)3) and fluorescent red dopants (DCJTB) and yellow fluorescent dopants (EY53) were doped in a high-energy level (CBP) in the production of the main light yellow light-emitting layer. In order to improve the life of components, and then days with high-efficiency blue fluorescent dopants (BUBD-1) doped bipolar light-emitting fluorescent main body (MADN) and the broadband spectrum of white light. The device at 20mA/cm2 current efficiency of 21cd/A, the E.Q.E. of 6.62%, and CIE of (0.40,0.46) for white light. In addition to p-type doped material (WO3) and n-type dopants (Cs2CO3) were doped hole transport layer (NPB) and electron transport layer (BPhen) as the p-hole transport layer and the n-type electronic transmission layer to significantly reduce device voltage to achieve high efficiency and high brightness of the white organic light-emitting diodes. Also for flexible substrates, to produce new packaging technology, in PDMS thin films deposited on silicon dioxide (to increase resistance to water penetration of oxygen. This method produced without the use of solvent protective coating to achieve the goal of low cost and simplicity.

並列關鍵字

phosphorescent sensitizer fluorescent ； white organic light emitting diodes ； color-stability ； novel encapsulation

參考文獻

參考文獻

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