Organic electroluminescent device and method for fabricating the same
An organic electroluminescent device comprising a thin film transistor (TFT), an organic light-emitting diode (OLED), and a capacitor. The TFT is disposed in a non-emitting region of a substrate. An insulating layer is formed on the substrate and covers the switch TFT. The OLED having a top electrode and a bottom electrode is disposed on the insulating layer in an emitting region of the substrate. The capacitor having a top electrode and a bottom electrode is disposed on the insulating layer in the non-emitting region of the substrate and electrically connected to the TFT. The top electrode of the OLED and the top electrode of the capacitor are formed of a patterned conductive layer. A method of fabricating the organic electroluminescent device is also disclosed.
1. An organic electroluminescent device, comprising:
a substrate having a non-emitting region and an emitting region defined thereon;
a thin film transistor disposed in the non-emitting region;
an insulating layer formed on the substrate and covering the thin film transistor;
an organic light-emitting diode, having a top electrode and a bottom electrode, disposed on the insulating layer in the emitting region; and
a capacitor, having a top electrode and a bottom electrode, disposed on the insulating layer in the non-emitting region and electrically connected to the thin film transistor;
wherein the top electrode of the organic light-emitting diode and the top electrode of the capacitor are formed of a patterned conductive layer.
2. The device as claimed in claim 1 , wherein the patterned conductive layer comprises a continuous conductive layer.
3. The device as claimed in claim 1 , wherein the top electrode of the capacitor comprises an opaque conductive layer.
4. The device as claimed in claim 1 , wherein the bottom electrode of the organic light-emitting diode and the bottom electrode of the capacitor are formed of a patterned conductive layer.
5. The device as claimed in claim 1 , wherein the bottom electrode of the capacitor comprises a transparent conductive layer.
6. The device as claimed in claim 1 , wherein the capacitor is disposed on the insulating layer over the thin film transistor.
7. The device as claimed in claim 1 , further comprising an organic electroluminescent medium layer underlying the top electrode of the capacitor.
8. The device as claimed in claim 7 , wherein the top electrode of the capacitor at least partially overlaps the underlying organic electroluminescent medium layer.
9. A method for fabricating an organic electroluminescent device, comprising:
providing a substrate having a non-emitting region and an emitting region defined thereon;
forming a thin film transistor in the non-emitting region;
forming a first insulating layer on the substrate so as to cover the thin film transistor;
forming a bottom electrode on the first insulating layer in the non-emitting region and the emitting region, so that the bottom electrode in non-emitting region is electrically connected to the thin film transistor;
forming a second insulating layer on the first insulating layer to cover the bottom electrode in the non-emitting region and to expose the bottom electrode in the emitting region;
forming an organic electroluminescent medium layer on the second insulating layer in the emitting region to cover the exposed bottom electrode; and
forming a top electrode on the second insulating layer in the non-emitting region and on the organic electroluminescent medium layer in the emitting region, respectively.
10. The method as claimed in claim 9 , wherein the step of forming an organic electroluminescent medium layer further comprising forming the organic electroluminescent medium layer over the thin film transistor to at least partially overlap the top electrode of the capacitor.
11. The method as claimed in claim 9 , wherein the bottom electrode in the non-emitting region is formed over the thin film transistor.
12. The method as claimed in claim 9 , wherein the bottom electrode of the light-emitting diode and the bottom electrode of the capacitor are formed of a patterned conductive layer.
13. The method as claimed in claim 12 , wherein the bottom electrode of the capacitor comprises a transparent conductive layer.
14. The method as claimed in claim 9 , wherein the top electrode of the light-emitting diode and the top electrode of the capacitor are formed of a patterned conductive layer.
15. The method as claimed in claim 14 , wherein the top electrode of the capacitor comprises an opaque conductive layer.
16. The method as claimed in claim 14 , wherein the patterned conductive layer comprises a continuous conductive layer.