Patterning method for OLEDs
Methods of fabricating a device having laterally patterned first and second sub-devices, such as subpixels of an OLED, are provided. Exemplary methods may include depositing via organic vapor jet printing (OVJP) a first organic layer of the first sub-device and a first organic layer of the second sub-device. The first organic layer of the first sub-device and the first organic layer of the second sub-device are both the same type of layer, but have different thicknesses. The type of layer is selected from an ETL, an HTL, an HIL, a spacer and a capping layer.
1. A method of fabricating a device having at least laterally patterned first and second sub-devices, the method comprising:
depositing via organic vapor jet printing (OVJP) a first organic layer of the first sub-device and a first organic layer of the second sub-device;
wherein the first organic layer of the first sub-device and the first organic layer of the second sub-device have different thicknesses;
wherein the first organic layer of the first sub-device and the first organic layer of the second sub-device are both the same type of layer, and wherein the type of layer is selected from an ETL, an HTL, an HIL, a spacer and a capping layer;
wherein the first organic layer of the first sub-device and the first organic layer of the second sub-device have different material compositions;
wherein the first organic layer of the first sub-device and the first organic layer of the second sub-device are both HTLs, and wherein a triplet state energy of the first organic layer of the first sub-device is within 0.3 eV of a triplet state energy of the first organic layer of the second sub-device.
2. The method of claim 1 wherein the first organic layer of the first sub-device and the first organic layer of the second sub-device are disposed within optical cavities.
3. The method of claim 1 wherein the first and second sub-devices are OLEDs.
4. The method of claim 3 wherein the first and second sub-devices each emit a different color of light.
5. The method of claim 3 wherein the device further includes a third sub-device, and the first, second and third sub-devices each emit a different color of light.
6. The method of claim 5 wherein the first, second and third devices each emit a different color selected from red, green and blue.
7. The method of claim 1 wherein the first organic layer of the first sub-device and the first organic layer of the second sub-device have a thickness difference greater than approximately 10 Å.
8. The method of claim 1 wherein the first organic layer of the first sub-device and the first organic layer of the second sub-device have a thickness difference greater than approximately 20 Å.
9. The method of claim 1 wherein the first organic layer of the first sub-device and the first organic layer of the second sub-device have a thickness difference in a range of approximately 10 Å-1000 Å.
10. The method of claim 1 wherein the lateral separation between the first and second sub-devices is at most 1.0 mm.
11. The method of claim 1 wherein the first organic layer of the first sub-device and the first organic layer of the second sub-device are both HTLs, and wherein hole transport property of the first organic layer of the first sub-device is different from the first organic layer of the second sub-device.
12. The method of claim 1 wherein the device is a consumer device.
13. The method of claim 1 , wherein the device is incorporated into an optoelectronic device.
14. The method of claim 13 , wherein the optoelectronic device is incorporated into one of a vehicle, a computer, a television, a printer, a large area wall, a theater or stadium screen, a billboard, or a sign.
15. A method of fabricating a device having at least laterally patterned first and second sub-devices, the method comprising:
depositing via organic vapor jet printing (OVJP) a first organic layer of the first sub-device and a first organic layer of the second sub-device;
wherein the first organic layer of the first sub-device and the first organic layer of the second sub-device have different thicknesses and have different material compositions; and
wherein the first organic layer of the first sub-device and the first organic layer of the second sub-device are both HTLs;
wherein hole transport property of the first organic layer of the first sub-device is different from the first organic layer of the second sub-device; and
wherein a triplet state energy of the first organic layer of the first sub-device is within 0.3 eV of a triplet state energy of the first organic layer of the second sub-device.