Efficient Organic Electroluminescent Devices Based on a Doped Co-Host System
2003
Hochschulschrift
Zugriff:
91
In this thesis, we have developed an efficient red OLED device based on the fluorescent dye 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetra- methyl-julolidyl-9-enyl)-4H-pyran (DCJTB) doped in a novel co-host emitter system of 9,10-di(2-naphthyl) anthracene (ADN) and Alq3, which achieved a luminance efficiency of 4.2— 5.5 cd/A at 20 mA/cm2 with a CIEx,y color coordinate of [0.64, 0.35] — [0.62, 0.37]. At high ADN concentration (>60%), this co-hosted emitter system possessed the advantage of alleviating the current-induced fluorescence quenching problem often encountered in red organic EL devices and greatly improved the EL efficiency over a wide range of drive current conditions. This novel composition of co-host emitter also significantly improved the device lifetime which is attributed to the elimination of the heterointerface present in conventional devices that greatly affects the device reliability.
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Efficient Organic Electroluminescent Devices Based on a Doped Co-Host System
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Autor/in / Beteiligte Person: | Chung Yeh Iou ; 游宗燁 |
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Veröffentlichung: | 2003 |
Medientyp: | Hochschulschrift |
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