Claims
- 1. A device comprising:
an organic light emitting device; and a photodetector disposed adjacent the organic light emitting device, the photodetector being adapted to detect light emitted by the organic light emitting device.
- 2. The device of claim 1, wherein the photodetector is organic.
- 3. The device of claim 2, wherein the organic photodetector is disposed to the side of the organic light emitting device.
- 4. The device of claim 2, wherein the organic light emitting device and the organic photodetector share a transparent electrode.
- 5. The device of claim 4, wherein the organic photodetector is disposed over of the organic light emitting device.
- 6. The device of claim 4, wherein the organic photodetector is disposed under the organic light emitting device.
- 7. The device of claim 4, wherein the organic photodetector occupies at most ten percent of the surface area of the organic light emitting device.
- 8. The device claim 7, wherein the organic photodetector occupies at most one percent of the surface area of the organic light emitting device.
- 9. The device of claim 7, wherein:
the organic light emitting device further comprises:
a first electrode; an organic layer electrically connected to the first electrode; and a second electrode electrically connected to the organic layer, said second electrode having first and second portions; and the photodetector further comprises:
a first portion of the second electrode; a photodetector active region electrically connected to the first portion of the second electrode; and a third electrode electrically connected to the photodetector active region.
- 10. The device of claim 9, wherein:
the second portion of the second electrode comprises:
the same materials as the first portion of the second electrode; and a reflective layer.
- 11. The device of claim 9, wherein:
the second portion of the second electrode comprises a reflective electrode that does not include the same layers as the first portion of the second electrode.
- 12. The device of claim 2, where all electrodes of the organic light emitting device are transparent, and all electrodes of the organic photodetector are transparent.
- 13. The device of claim 2, further comprising a feedback circuit adapted to detect a signal from the photodetector and control the organic light emitting device based on the signal.
- 14. The device of claim 13, wherein the feedback circuit is adapted to maintain a desired intensity of light emission from the organic light emitting device.
- 15. The device of claim 14, wherein the feedback circuit further comprising a transistor connected to the organic light emitting device and the organic photodetector, the transistor providing feedback between the organic light emitting device and the organic photodector to maintain bistability of the device.
- 16. The device of claim 4, wherein the transparent electrode is a transparent cathode.
- 17. The device of claim 16, wherein the transparent cathode comprises Mg:Ag.
- 18. The device of claim 4, wherein the organic light emitting device further comprises:
a first electrode disposed over a substrate; an organic first hole transport layer disposed over the first electrode; an organic emissive layer disposed over the first hole transport layer; an organic electron transport layer disposed over the emissive layer; and a second electrode disposed over the electron transport layer, wherein the second electrode is the transparent electrode shared by the organic light emitting device and the organic photodetector.
- 19. The device of claim 18, wherein the photodetector further comprises:
the second electrode; an organic photodetector active region disposed over the second hole transport layer; and a third electrode disposed over the organic photodetector active region.
- 20. The device of claim 19, wherein the first electrode, the second electrode and the third electrode are transparent.
- 21. The device of claim 19, wherein the photodetector further comprises a buffer layer disposed between the photodetector active region and the third electrode.
- 22. The device of claim 19, wherein the photodetector active region further comprises at least sixteen alternating layers of copper phthalocyanine (CuPc) and 3,4,9,10-perylenetetracarboxylic bis-benzimidazole (PTCBI).
- 23. The device of claim 19, wherein the photodetector active region further comprises at least eight alternating layers of copper phthalocyanine (CuPc) and 3,4,9,10-perylenetetracarboxylic bis-benzimidazole (PTCBI).
- 24. The device of claim 19, wherein the photodetector active region further comprises a single bilayer of copper phthalocyanine (CuPc) and 3,4,9,10-perylenetetracarboxylic bis-benzimidazole (PTCBI).
- 25. The device of claim 19, wherein the photodetector active region further comprises a transparent top electrode.
- 26. The device of claim 1, wherein the device is incorporated into a monitor.
- 27. The device of claim 1, wherein the device is incorporated into a bistable switch.
- 28. The device of claim 1, wherein the device incorporated into an electronic paper.
- 29. The device of claim 1, wherein the device is incorporated into an electronic blackboard.
- 30. The device of claim 1, wherein the photodetector is inorganic.
- 31. The device of claim 1, wherein the photodetector is disposed under the organic light emtting device.
- 32. The device of claim 31, wherein the photodetector is a silicon diode fabricated on a silicon backplane.
- 33. A device, comprising:
an organic light emitting device adapted to emit light; an organic photodetector disposed adjacent to the organic light emitting device, the organic photodetector adapted to detect the light emitted from the organic light emitting device, and a feedback circuit connected to the organic light emitting device and the organic photodetector, the feedback circuit being adapted to adjust the current passing through the organic light emitting device based on the light detected by the organic photodetector.
- 34. The device of claim 33, wherein the organic light emitting device is off when the device is in a low state.
- 35. The device of claim 33, wherein the light transmitted by the organic light emitting device is directly coupled into the photodetector through the transparent electrode when the device is in a high state.
- 36. The device of claim 33, wherein the feedback circuit is external.
- 37. The device of claim 33, wherein the feedback circuit is an internal linear circuit.
- 38. A device, comprising:
a first electrode further comprising indium-tin-oxide (ITO); an organic light emitting layer further comprising:
a layer of 4,4′-[N-(1-naphthyl)-N-phenyl-amino]biphenyl (α-NPD) disposed over the first electrode; a layer of fac tris(2-phenylpyridine) iridium [Ir(ppy)3] doped into a 4,4′-N,N′-dicarbazole-biphenyl (CBP) host disposed over the layer of α-NPD; a layer of bathocuproine (BCP) disposed over the layer of CBP: Ir(ppy)3; a layer of tris(8-hydroxyquinoline) aluminum (Alq3) disposed over the layer of BCP; a second electrode further comprising:
a layer of Mg:Ag disposed over the organic light emitting layer; a layer of ITO disposed over the layer of Mg:Ag; an organic light detecting layer further comprising:
a layer of 4,4′,4″-tris(3-methyl-phenyl-phenyl-amino)triphenylamine (MTDATA) doped with two weight percent tetrafluoro-tetracyano-quinodimethane (F4-TCNQ) disposed over the second electrode; layers of CuPc, alternating with layers of 3,4,9,10-perylenetetracarboxylic bis-benzimidazole (PTCBI), disposed over the layer of MTDATA: F4-TCNQ (2%); a layer of bathocuproine (BCP) disposed over CuPc and PTCBI; and a third electrode further comprising A1.
Parent Case Info
[0001] This is a continuation-in-part of application Ser. No. 10/219,760, filed Aug. 16, 2002, the subject matter of which is incorporated herein.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
10219760 |
Aug 2002 |
US |
Child |
10254265 |
Sep 2002 |
US |