Full-color active matrix organic electroluminescent device, fabrication method thereof and electronic devices employing the same
View Patent ↗A full-color active matrix organic electroluminescent device and fabrication method thereof. The full-color active matrix organic electroluminescent device includes a substrate with a plurality of TFTs, a buffer layer formed on the substrate beyond the TFTs, a color filter formed on the buffer layer, a flat layer formed on the entire surface of the color filter, a first electrode formed on the flat layer, an organic electroluminescent layer formed on the first electrode, and a second electrode formed on the organic electroluminescent layer, wherein the flat layer is formed by a low temperature thin film process.
1. A color active matrix organic electroluminescent device, comprising a plurality of pixel areas arranged in a matrix, each pixel area comprising:
a thin film transistor formed on a substrate;
a buffer layer formed on the substrate beyond the thin film transistor;
a color filter formed on the buffer layer;
a flat layer formed on the color filter;
a first electrode formed on the flat layer and electrically connected to the thin film transistor;
an organic electroluminescent layer formed on the first electrode; and
a second electrode formed on the organic electroluminescent layer.
2. The device as claimed in claim 1 , wherein the flat layer is fanned by a low temperature thin film process.
3. The device as claimed in claim 2 , wherein the low temperature thin film process has an operating temperature not more than 350° C.
4. The device as claimed in claim 1 , wherein the surface roughness of the flat layer is less than 10 nm.
5. The device as claimed in claim 1 , wherein the flat layer has a thickness more than 10 times larger than the surface roughness of the color filter.
6. The device as claimed in claim 2 , wherein the low temperature thin film process is liquid phase deposition., spin-on coating, or sputtering.
7. The device as claimed in claim 2 , wherein the law temperature thin film process is low temperature magnetron sputtering.
8. The device as claimed in claim 1 , wherein the flat layer is low temperature dielectric layer or spin-on glass.
9. An electronic device, comprising
a color active matrix organic electroluminescent device as claimed in claim 2 ; and
a controller, wherein the controlleroperatively couples to the full-color active matrix organic electroluminescent device.
10. The device as claimed in claim 1 , wherein the first electrode is formed directly on the flat layer.
11. The device as claimed in claim 1 , wherein the first electrode is formed directly on and touching the flat layer.
12. The device as claimed in claim 1 , wherein the first electrode is formed on the flat layer with out an intervening layer.
13. The device as claimed in claim 1 , wherein the flat layer has a planarized surface on which the first electrode is formed.
14. The device as claimed in claim 1 , wherein the flat layer has a smooth top surface on which the first electrode is formed.