Performance Enhancement in Organic Electrochemical Light-Emitting Cells by Blending of Polymers
| Autor: | Hong-Yu Shi, 施宏昱 |
|---|---|
| Rok vydání: | 2017 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 105 In this study, Ru(bpy)3(pF6)2 was used as the luminescent material and was adopted the same weight of 35 mg to blend with concentration 1.5 wt% PVA、 PEO、PMMA、PEDOT:PSS solution respectively, and then spin-coated to form a film constitute the active layer. The Ru(bpy)3(pF6)2 may be wrapped by polymer after blending, reducing the chances of Ru(bpy)32﹢absorb moisture in the air, improve the stability of devices. In addition, a layer of lithium fluoride (LiF) was further vapor deposited on the Ru(bpy)3(pF6)2 and polymer mixture, reduce the electron injection energy barrier, increase the quantity of electrons and holes recombination in the light emitting layer. That can avoid the direct contact of Ru(bpy)32﹢ with air to increase the stability of devices. The results of test show that, Ru(bpy)3(pF6)2 blended PEO has the best brightness and lifetime performance, of which the brightness of 4.73E-4 (lm), luminous efficiency of 0.093(lm/W). Next, a layer of LiF was vapor deposited on the Ru(bpy)3(pF6)2 and polymer mixture as a electron injection layer, enhance the brightness and lifetime of OLEC. The LiF thickness of 1.5nm is the best thickness, can significantly enhance the brightness and lifetime of OLEC. Ru(bpy)3(pF6)2 blended PEO and vapor deposited the thickness of 1.5nm LiF as the electron injection layer, brightness can increase about 3.97 times to 1.88E-3(lm) ; Luminous efficiency increases about 10 times to 0.92 (lm/W). |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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