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US 2008/0257409 A1Published application
Photovoltaics on silicon
AssigneeAmberWave Systems Corporation
InventorsJizhong Li, Anthony J. Lochtefeld, Calvin Sheen, Zhiyuan Cheng
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Abstract
Structures including crystalline material disposed in openings defined in a non-crystalline mask layer disposed over a substrate. A photovoltaic cell may be disposed above the crystalline material.
Claims41
A structure for use in photovoltaic applications comprising:
- a mask layer disposed above a top surface of a substrate, the mask layer comprising a non-crystalline material and having an opening extending from a top surface of the mask layer to the top surface of the substrate;
- a crystalline material disposed in the opening, the crystalline material having a first region disposed above and proximal to a portion of the top surface of the substrate and a second region disposed above the first region and above the portion of the top surface of the substrate, the second region having substantially fewer defects than the first region;
- and
- a photovoltaic cell disposed above the crystalline material.
1 more element
A structure for use in photovoltaic applications comprising:
- a mask layer disposed above a top surface of a substrate, the mask layer comprising a non-crystalline material and having a plurality of openings extending from a top surface of the mask layer to the top surface of the substrate;
- a crystalline material disposed in and above the plurality of openings, a portion of the crystalline material disposed above the openings having substantially fewer defects than a second portion of the crystalline material disposed within the openings and adjacent to the top surface of the substrate;
- and
- a photovoltaic cell disposed above the crystalline material.
1 more element
A structure for use in photonic applications comprising:
- a mask layer disposed above a top surface of a substrate and including an opening extending from a top surface of the mask layer to the top surface of the substrate;
- a crystalline material disposed in the opening;
- and
- a photonic device disposed above the crystalline material, the photonic device having an active junction including a surface that extends in a direction substantially away from the top surface of the substrate.
1 more element
A structure comprising:
- a first semiconductor material disposed on a substrate, the first semiconductor material including a sidewall extending away from the substrate;
- a second semiconductor layer disposed on a portion of the sidewall to define an active device junction region;
- and
- a mask layer disposed on the substrate adjacent to a bottom region of the sidewall, the mask layer electrically isolating the second semiconductor layer from the substrate.
1 more element
Dependencies are inferred from the claim text.