Patterned light emitting devices
Light-emitting devices, and related components, systems and methods are disclosed. A light-emitting device can include a multi-layer stack of materials that includes a light-generating region and a first layer supported by the light-generating region. During use of the light-emitting device, light generated by the light-generating region can emerge from the light-emitting device via a surface of the first layer. The surface of the first layer can have a dielectric function that varies spatially as a pattern and at least about 45% of a total amount of light generated by the light-generating region can emerge from the light-emitting device emerges via the surface of the light-emitting device.
1. A light-emitting device, comprising:
a multi-layer stack of materials including a light-generating region and a first layer supported by the light-generating region so that, during use of the light-emitting device, light generated by the light-generating region can emerge from the light-emitting device via a surface of the first layer,
wherein the light-emitting device has an edge which is at least about one millimeter long, and the light-emitting device is designed so that a quantum efficiency of the light-emitting device is substantially independent of the length of the edge of the length of the edge.
2. A light-emitting device, comprising:
a multi-layer stack of materials including a light-generating region and a first layer supported by the light-generating region so that, during use of the light-emitting device, light generated by the light-generating region can emerge from the light-emitting device via a surface of the first layer,
wherein the light-emitting device has an edge which is at least about one millimeter long, and the light-emitting device is designed so that a wall plug efficiency of the light-emitting device is substantially independent of the length of the edge of the length of the edge.
3. A light-emitting device, comprising:
a multi-layer stack of materials including a light-generating region and a first layer supported by the light-generating region so that, during use of the light-emitting device, light generated by the light-generating region can emerge from the light-emitting device via a surface of the first layer,
wherein the light-emitting device has an edge which is at least about one millimeter long, and the light-emitting device is designed so that an extraction efficiency of the light-emitting device is substantially independent of the length of the edge of the length of the edge.
4. The light-emitting device of claim 3 , wherein the length of the edge is at least about two millimeters.
5. The light-emitting device of claim 3 , wherein the length of the edge is at least about three millimeters.
6. The light-emitting device of claim 3 , wherein the light-emitting device includes at least one additional edge having a length of at least about one millimeter.
7. The light-emitting device of claim 3 , wherein at least about 90% of the total amount of light generated by the light-generating region that emerges from the light-emitting device emerges from the light-emitting device via the surface of the first layer.
8. The light-emitting device of claim 3 , wherein the multi-layer stack of materials comprises a multi-layer stack of semiconductor materials.
9. The light-emitting device of claim 8 , wherein the first layer comprises a layer of n-doped semiconductor material, and the multi-layer stack further includes a layer of p-doped semiconductor material.
10. The light-emitting device of claim 9 , wherein the light-generating region is between the layer of n-doped semiconductor material and the layer of p-doped semiconductor material.
11. The light-emitting device of claim 3 , further comprising a support that supports the multi-layer stack of materials.
12. The light-emitting device of claim 11 , further comprising a layer of reflective material that is capable of reflecting at least about 50% of light generated by the light-generating region that impinges on the layer of reflective material, the layer of reflective material being between the support and the multi-layer stack of materials.
13. The light-emitting device of claim 12 , wherein the first layer comprises a layer of an n-doped material, the multi-layer stack of materials further includes a layer of p-doped material, and a distance between the layer of p-doped semiconductor material and the layer of reflective material is less than a distance between the layer of n-doped semiconductor material and the layer of reflective material.
14. The light-emitting device of claim 3 , further including a current-spreading layer between the first layer and the light-generating region.
15. The light-emitting device of claim 3 , wherein the multi-layer stack of materials comprise semiconductor materials.
16. The light-emitting device of claim 3 , further comprising electrical contacts configured to inject current into the light-emitting device.
17. The light-emitting device of claim 16 , wherein the electrical contacts are configured to vertically inject electrical current into the light-emitting device.
18. The light-emitting device of claim 3 , wherein the light-emitting device comprises a light emitting diode.
19. The light-emitting device of claim 3 , wherein the light-emitting device is in the form of a packaged light-emitting device.
20. The light-emitting device of claim 3 , wherein a surface of the first layer includes topological features that enhance light extraction.