Transparent contacts for organic devices

1. An organic light emitting device structure, comprising:

a substrate;

a first electrically conductive layer formed over the substrate, wherein the first electrically conductive layer has a positive polarity;

a transparent organic light emitting device formed over the first electrically conductive layer;

a transparent electrically conductive metal layer formed over the transparent organic light emitting device, wherein the metal has a work function less than 4 eV; and

a second electrically conductive layer formed over the transparent electrically conductive metal layer, wherein the second electrically conductive layer has a negative polarity, and wherein the second electrically conductive layer comprises a material selected from the group consisting of a transparent electrically conductive oxide and a transparent electrically conductive polymer.

2. The organic light emitting device structure of claim 1 wherein the second electrically conductive layer comprises a transparent electrically conductive oxide.

3. The organic light emitting device structure of claim 2 wherein the second electrically conductive layer comprises indium tin oxide.

4. The organic light emitting device structure of claim 2 wherein the transparent electrically conductive metal layer comprises magnesium.

5. The organic light emitting device structure of claim 2 wherein the transparent electrically conductive metal layer comprises silver.

6. The organic light emitting device structure of claim 2 wherein the substrate is transparent.

7. The organic light emitting device structure of claim 2 wherein the substrate is rigid.

8. The organic light emitting device structure of claim 2 wherein the first electrically conductive layer is transparent.

9. The organic light emitting device structure of claim 2 wherein the first electrically conductive layer comprises indium tin oxide.

10. The organic light emitting device structure of claim 2 wherein the first electrically conductive layer comprises a metal layer.

11. The organic light emitting device structure of claim 2 wherein the transparent electrically conductive metal layer has a thickness of 50–400 angstroms.

12. The organic light emitting device structure of claim 2 wherein the transparent electrically conductive metal layer has a thickness less than 100 angstroms.

13. An organic light emitting device structure comprising:

a substrate layer comprising a first transparent electrically conductive coating deposited on a surface;

a first light emitting device deposited on the first transparent electrically conductive coating;

a second transparent electrically conductive coating deposited on the surface of the first device not in contact with the first coating;

a second light emitting device deposited on the surface of the second coating;

a third transparent electrically conductive coating deposited on the surface of the second device not in contact with the second coating;

a third light emitting device deposited on the surface of the third coating, wherein the first, second, and third light emitting devices each include an organic emission layer for emitting light of a desired color, respectively; and

a fourth transparent electrically conductive coating deposited on the surface of the third device not in contact with the third coating.

14. The organic light emitting device structure of claim 13 , wherein the first, second, third and fourth transparent electrically conductive coatings are adapted to receive individual sources of biasing potential, respectively.

15. The organic light emitting device structure of claim 13 wherein the substrate layer is rigid.

16. The organic light emitting device structure of claim 13 wherein the first transparent electrically conductive coating comprises indium tin oxide.

17. The organic light emitting device structure of claim 13 wherein the first transparent electrically conductive coating comprises a metal layer.