Vertical silicon and iii-v photovoltaics integration with silicon electronics
AssigneeInternational Business Machines Corporation
InventorsDevendra K. Sadana, Ning Li
Life of this patent
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Abstract
A photovoltaic structure includes a substrate; and a plurality of off-axis, doped silicon regions outward of the substrate. The plurality of off-axis, doped silicon regions have an off-axis lattice orientation at a predetermined non-zero angle. A plurality of photovoltaic devices of a first chemistry are located outward of the plurality of off-axis, doped silicon regions. Optionally, a plurality of photovoltaic devices of a second chemistry, different than the first chemistry, are located outward of the substrate and are spaced away from the plurality of off-axis, doped silicon regions.
Claims20
A photovoltaic structure comprising:
- a substrate;
- a plurality of off-axis, doped silicon regions outward of the substrate, the plurality of off-axis, doped silicon regions having an off-axis lattice orientation at a predetermined non-zero angle;
- and
- a plurality of photovoltaic devices of a first chemistry, outward of the plurality of off-axis, doped silicon regions.
A method of forming a photovoltaic structure, comprising:
- providing a substrate having an outer surface;
- direct wafer bonding, to the outer surface of the substrate, an off-axis silicon layer, having an off-axis lattice orientation at a predetermined non-zero angle;
- forming a plurality of off-axis, doped silicon regions in the off-axis silicon layer;
- and
- forming a plurality of photovoltaic devices of a first chemistry outward of the plurality of off-axis, doped silicon regions.
A method of forming a photovoltaic structure, comprising:
- providing a silicon substrate;
- forming an oxide layer outward of the silicon substrate and having an outer surface;
- and
- direct wafer bonding a fabrication layer to the oxide layer;
- and
- forming a plurality of photovoltaic devices at least partially in the fabrication layer.
Dependencies are inferred from the claim text.