Abstract
The multilayer contact structures both in the anode and cathode for top emission organic light emitting diodes (TEOLEDs) were studied. In the anode consisting of Al/Au, the Al was used for high reflectivity and Au for high work function which enhanced the hole injection from anode into the organic hole transport layer. In this structure the Au takes the place of indium-tin-oxide (ITO). In the cathode consisting of LiF/Al/Ag, the Al layer as thin as 4 nm for upward light transmitting and the Ag layer of 10 nm for low resistivity contact were employed in the multilayer cathode for top emitting. Optimum thickness parameters for anode and cathode multilayers were studied to achieve the maximum brightness of 1850 cd/m2 at 11.5 V and maximum luminance yield of 1.85 cd/A at 8.5 V for TEOLED on glass substrate. Finally a TEOLED structure was successfully fabricated on plastic substrate with the maximum brightness of 575 cd/m2 at 9V.
| Original language | English |
|---|---|
| Pages (from-to) | 517-522 |
| Number of pages | 6 |
| Journal | International Journal of Microwave and Optical Technology |
| Volume | 1 |
| Issue number | 2-I |
| State | Published - 08 2006 |
| Externally published | Yes |
Bibliographical note
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