OLED溶液製程的光色調變方法及蒸鍍材料的溶液製程 與連續下料輔助裝置

Abstract

本實驗室為了改善大面積刮刀製程中膜厚會隨著刮刀行進過程中溶液的減少而導致膜厚下降的問題，而發展出連續下料的方法，本論文將針對的連續下料進行可行性驗證，驗證結果為在下料的前後兩端的元件在效率上並無太大差異，代表膜厚已無溶液不足而減少的問題，並設計輔助裝置以取代連續下料中手動控制的部分。 另一部分是與昱鐳光電合作，嘗試以蒸鍍製程的材料與結構用全溶液製程來製作元件，當中發現PER54:Ir(mppy)3:EPH325各別溶在甲苯和氯仿中以刮刀塗佈刮膜會有特殊聚集現象，以及對只能各別溶解於氯仿和甲醇的材料，用混溶的方式進行刮刀塗佈，可解決無法共同溶解材料的問題，在更換結構後以ITO /PEDOT /NPB /26DCzPPy:10%PER54 /TPBi做出效率達9.43 Cd⁄A，在6V時亮度約1000nits此時為效率8.47Cd⁄A，CIE色座標為(0.6306,0.3560)的紅光。 最後是對雙摻雜系統進行溶液製程的光色調變，當中確認了在溶液製程中除了單純的比例調整外，還會因為材料調和後加熱的時間、調和順序等因素造成光色上的變化，而實驗調變的光色範圍約略在CIE色座標趨勢線Y=0.8005-0.589X或是Y=0.7977-0.581X上，並且調配出在電壓8V時亮度約1000nits效率可達28.75 Cd⁄A CIE色座標(0.4390, 0.5440 )的黃光。

In order to improve the thin-film thickness decreasing problem, which due to the solution decreasing while the blade is moving, we developed the continuous delivery to solve this problem. This thesis will examine the feasibility of continuous delivery, the current efficiency between front and behind diodes are similarly as a result. That presents the problem of the thin-film thickness decreasing had been solved, then design an assisted device of continuous delivery to replace the manual control. The other part is cooperating with e-Ray Optoelectronics Technology Co., Ltd that we try to use deposition structure and materials in solution process. In this way we found the solution of PER54: Ir(mppy)3: EPH325 is distinct from chloroform and toluene in blade coating, and using a mixture way to material, which is dissolved in either chloroform or methanol. After changing the structure in ITO /PEDOT /NPB /26DCzPPy:10%PER54 /TPBi /LiF /Al, current efficient can reach9.43 Cd⁄A, and at 6 volt, luminance is about 1000nits and current efficient can reach 9.43 Cd⁄A and get red light in CIE color coordinates (0.6306, 0.3560). The last part is color variable method in solution process for co-doping system. This part confirmed that the influence factors of light color, besides ratio of materials, are heating time after blending and order of blending. In experiment, light color control range is near the trending line of CIE color coordinates in Y=0.8005-0.589X or Y=0.7977-0.581X, and blending out the yellow light in CIE color coordinates (0.4390, 0.5440), and at 8 volt, luminance is about 1000nits with current efficient28.75 Cd⁄A.