Organic laser

• US 7,724,796 B2
• Filed: 08/29/2006
• Issued: 05/25/2010
• Est. Priority Date: 08/29/2006
• Status: Active Grant

• Current Assignee: The Trustees of Princeton University (Princeton University)
• Original Assignee: The Trustees of Princeton University (Princeton University)
• Inventors: Forrest, Stephen, Giebink, Noel
• Primary Examiner(s): Harvey; Minsun
• Assistant Examiner(s): Nguyen; Phillip
• Application Number:
  US11/511,356
• Publication Number:
  US 20080067530A1
• Time in Patent Office: 1,365 Days
• Field of Search: 372/38.06, 372/46.01, 372/69, 372/70, 257/79, 257/40
• US Class Current: 372/46.01
• CPC Class Codes: H01S 5/041 Optical pumping
• CPC Class Codes: H01S 5/36 comprising organic materials
• CPC Class Codes: H10K 50/00 Organic light-emitting devices integrated devices or assemblies of multiple devices H10K59/00, H10K65/00; organic semiconductor lasers H01S5/36

Abstract

A device comprising an organic light emitting layer may be optically pumped to create excited states within the layer. When an electric field is applied across the layer, the excited states may dissociate into geminate polaron pairs within the organic layer. The dissociated states may change back to excitons when the electric field is rapidly reduced or removed. The organic light emitting layer may be optically pumped by an adjacent OLED, allowing for an electrically-driven device.

Claims

1. A device comprising:

a substrate;

a pumped emissive device; and

an optical pump;

wherein the pumped emissive device comprises in order;

a first electrode;

a first insulating layer;

an organic light emitting layer;

a second insulating layer; and

a second electrode;

wherein when an adjustable electric field is applied across the first and second electrodes, the first and second insulating layers block electrical current through the organic light emitting layer.

2. The device of claim 1, wherein the organic light emitting layer comprises a first organic material doped with a second organic material.

3. The device of claim 2, wherein the organic light emitting layer comprises CBP doped with C6.

4. The device of claim 1, wherein the first and second insulating layers comprise a polymer.

5. The device of claim 1, wherein the first and second insulating layers are comprised of teflon.

6. The device of claim 1, wherein the optical pump provides energy to the organic light emitting layer at a linear rate.

7. The device of claim 1, wherein the optical pump comprises an OLED.

8. The device of claim 1, wherein the first and second insulating layers are thin enough to allow a desired number of charge carriers to tunnel through the insulating layers.

9. The device of claim 1, comprising in order the pumped emissive device, the substrate and the optical pump.

10. The device of claim 1, comprising in order the pumped emissive device, the optical pump, and the substrate.