溶液式製程有機發光二極體特性改善之研究

Study on the Improvement of Organic Light Emitting Diode by Solution Process

郭霖(Lin Kuo)

指導教授 ： 莊賦祥

國立虎尾科技大學/電機資訊學院/光電工程系光電與材料科技碩士班/碩士(2017年)

摘要

本論文以研究利用溶液式製程製作有機發光二極體與研究其元件壽命，主要研究重點為研製溶液式OLED，以達到元件壽命延長。其元件發光面積為1.5 cm × 1.5 cm。首先調配出發光層溶液，發光層為螢光主體材料UBH-215，摻雜螢光藍色及螢光紅色色材料UBD-07、DBP，製作雙波段發光元件。在紅色螢光 (DBP) 摻雜材料濃度為0.25 %時，且在電流密度15 mA/cm2下，亮度可達230 cd/m2。接著將電洞傳輸層加入P型摻雜材料 (F4-TCNQ ) 4 %後，將其比例、厚度做最佳化調整，提升其元件亮度及效率。接著加入HBＬ和ETL材料，再將其厚度做最佳化調整。最後，測試元件之壽命與特性。此元件色座標 (0.38, 0.28)。
實驗結果顯示各層最佳化的條件下，優化各層的材料參雜比例與調整各層的厚度，成功製作有機發光二極體其元件結構為: ITO/ spin-PEDOT:PSS (55 nm)/ spin-NPB: F4-TCNQ (35 nm)/ spin-UBH-215: 15 % UBD-07: 0.25 % DBP (50 nm)/ evap.-TPBi (10 nm)/ evap.-Alq3 (30 nm)/ LiF (0.8 nm)/ Al (150 nm)。

關鍵字

溶液製程 ； 白色有機發光二極體 ； P型摻雜 ； 壽命測試 ； 螢光材料

並列摘要

This paper has made use of solution process to produce organic light-emitting diodes and measure life-span of its components. The focus of the study is to research and produce solution-process OLED to achieve extended component life. Besides, its light-emitting size measures 1.5 cm X 1.5 cm. First of all, the luminous layer solution is formulated, and the layer is mainly of fluorescent-based material UBH-215, mixed with fluorescent materials in blue and red as UBD-07 and DBP in order to produce double-band light-emitting component. When red fluorescent (DBP) is mixed intensity as 0.25% and under current density as 15mA/cm2, its luminance can reach 230 cd/m2. Then, hole transport layer is added with P-typed mixed materials of (F4-TCNQ) by 4 %, and its ratio and thickness are rendered with optimization so as to enhance its component luminance and efficiency. Afterwards, Adding HBL and ETL materials to optimize their thickness. At the end, the component life and characteristics are tested. The coordinates of such component are (0.38,0.31 ).
As indicated from the experiment results, light-emitting diodes and the component structure successfully produced with every layer under optimization conditions given with following materials mixture ratio of optimized layers and thickness of each layer being adjusted are:ITO/ spin-PEDOT:PSS (55nm)/ spin-NPB: F4-TCNQ (35nm)/spin-UBH-215: UBD-07: DBP (40nm)/ evap.-TPBi(10nm)/ evap.-Alq3(30nm)/ LiF (0.8nm)/ Al (150nm)

並列關鍵字

Solution process ； White Organic Light-Emitting Diodes ； P-type dopant ； Lifetime test ； Fluorescent material

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