Highly efficient multiple reflection photosensitive optoelectronic device with optical concentrator
AssigneeThe Trustees of Princeton University
InventorsStephen R. Forrest, Vladimir Bulovic, Peter Peumans
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Abstract
Highly efficient photon recycling photosensitive optoelectronic device (POD) structures are disclosed which may include optical concentrating non-imaging collectors. Such device structures may be utilized with both organic and inorganic photoconverting heterostructures to enhance photoconversion efficiency. These photo recycling POD structures are particularly well suited for use with organic photoactive materials.
Claims41
A photosensitive optoelectronic device comprising:
- a first reflective layer;
- a transparent insulating layer adjacent the first reflective layer;
- a transparent first electrode layer adjacent the transparent insulating layer;
- a photosensitive heterostructure adjacent the transparent electrode;
- and
- a second electrode and reflective layer substantially parallel to the first reflective layer and adjacent the photosensitive heterostructure in spaced opposition to the first electrode,
- wherein one of the first reflective layer or the second electrode and reflective layer has an aperture for admittance of optical radiation to the photosensitive heterostructure.
A photosensitive optoelectronic device comprising:
- a substantially planar first reflective layer;
- a transparent insulating layer adjacent the first reflective layer;
- a transparent first electrode layer adjacent the transparent insulating layer;
- a photosensitive heterostructure adjacent the transparent electrode;
- and
- a substantially planar second electrode and reflective layer substantially parallel to the first reflective layer and adjacent the photosensitive heterostructure in spaced opposition to the first electrode layer,
- wherein the device has an exterior face transverse to the planes of the reflective layers, the exterior face having an aperture for admission of incident radiation to the interior of the device.
A photosensitive optoelectronic device comprising an array of photosensitive optoelectronic waveguide structures and optical concentrators, each optical concentrator having an entrance aperture and an exit aperture, the array having:
- a first reflective surface formed by the interior surfaces of the concentrators;
- a second reflective surface formed by the exterior surfaces of the concentrators;
- a transparent insulating layer, the transparent insulating layer having a non-planar upper surface in contact with the second reflective surface and a substantially planar lower surface;
- a transparent first electrode layer in contact with the lower surface of the transparent insulating layer;
- a photosensitive heterostructure in contact with the transparent electrode;
- and
- a third reflective surface in contact with the photosensitive heterostructure, the third reflective surface being the surface of a reflective second electrode layer,
- wherein the concentrator interior surfaces and the concentrator exterior surfaces are substantially parabolically sloped so that incident radiation is directed through the concentrator exit apertures and reflected between the second reflective surface and the third reflective surface until the radiation is substantially photoconverted by the photosensitive heterostructure.
Dependencies are inferred from the claim text.