Green light-emitting microcavity OLED device using a yellow color filter element

1. An organic light-emitting device (OLED) having green emitting regions disposed over a substrate, and wherein each green emitting region includes:

a) one or more light-emitting layer(s);

b) a reflector and a semitransparent reflector respectively disposed on opposite sides of the light-emitting layer(s) and arranged to resonate light produced by such layers such that the light has a substantial green spectral component;

c) a yellow color filter element disposed in relationship to each green emitting region to produce green light; and

d) wherein each yellow filter element is selected to have a cut-off wavelength between 475 nm and 560 nm and at visible wavelengths greater than the cut-off wavelength to at least 700 nm, the transmittance of the color filter element is greater than at the transmittance at the cut-off wavelength and at visible wavelengths lower than the cut-off wavelength to at least 400 nm the transmittance of the color filter element is less than at the transmittance at the cut-off wavelength.

2. The OLED device of claim 1 wherein the filter has a cut-off wavelength of between 490 nm and 540 nm.

3. The OLED device of claim 1 where the emitting region produces light having a green color and a peak light emission between 490 nm and 570 nm at a normal angle to the substrate.

4. The OLED device of claim 3 which has a peak light emission between 500 nm and 550 nm at a normal angle to the substrate.

5. The OLED device of claim 1 where the reflector, the semitransparent reflector, or both, also serve as electrodes for the light-emitting layers.

6. The OLED device of claim 5 which further comprises one or more emitting regions perceived to emit red light and one or more emitting regions perceived to emit blue light.

7. The OLED device of claim 1 where the semitransparent reflector includes Ag or an alloy containing Ag.

8. The OLED device of claim 1 which is configured to be a top emission device.

9. An organic light-emitting device (OLED) having green emitting regions and red emitting regions disposed over a substrate and wherein each green emitting region includes:

a) one or more light-emitting layer(s);

b) a reflector and a semitransparent reflector respectively disposed on opposite sides of the light-emitting layer(s) and arranged to resonate light produced by such layers such that the light has a substantial green spectral component, and each red emitting region includes:

i) one or more light-emitting layer(s);

ii) a reflector and a semitransparent reflector respectively disposed on opposite sides of the light-emitting layer(s) and arranged to resonate light produced by such layers such that the light has a substantial red spectral component; and

iii) a yellow color filter element disposed in relationship to each green and red emitting region so as to produce green and red light respectively.