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US 2025/0142978 A1Published application
Photovoltaic Devices Including An Interfacial Layer
AssigneeFirst Solar, Inc.
InventorsDavid Eaglesham, Peter V. Meyers
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Abstract
A photovoltaic cell can include an interfacial layer in contact with a semiconductor layer.
Claims25
A photovoltaic device comprising:
- a substrate;
- a transparent conductive layer residing over the substrate;
- a rectifying heterojunction including:
- a first semiconductor layer residing over the transparent conductive layer, the first semiconductor layer including:
- a wide bandgap semiconductor having a bandgap greater than 2.4 eV;
- a III-V compound or alloys thereof, the III-V compound including:
- a XY chemical formula, the X being selected from a group including boron, aluminum, gallium, indium, and thallium, and the Y being selected from a group including nitrogen, phosphorus arsenic, antimony, and bismuth;
- a second semiconductor layer residing over the first semiconductor layer, the second semiconductor layer including:
- a thickness of up to 2 μm;
- a II-VI compound or alloys thereof, the II-VI compound including:
- a AB chemical formula, A being selected from a group including zinc, cadmium, magnesium, manganese, and mercury and B being selected from a group including oxygen, sulfur, selenium, tellurium, and polonium;
- a thin-film interfacial layer residing over the second semiconductor layer;
- and
- a metal back contact residing over the interfacial layer.
11 more elements
A photovoltaic device comprising:
- a substrate;
- a transparent conductive layer residing over the substrate;
- a rectifying heterojunction including:
- a first semiconductor layer residing over the transparent conductive layer, the first semiconductor layer including:
- a wide bandgap n-type semiconductor having a bandgap greater than 2.4 eV;
- a III-V compound or alloys thereof, the III-V compound including:
- a XY chemical formula, the X being selected from a group including boron, aluminum, gallium, indium, and thallium, and the Y being selected from a group including nitrogen, phosphorus arsenic, antimony, and bismuth;
- an n-type interfacial layer residing over the first semiconductor layer;
- a second semiconductor layer residing over the n-type interfacial layer, the second semiconductor layer including:
- a thickness of up to 2 μm;
- a II-VI compound or alloys thereof, the II-VI compound including;
- a AB chemical formula, A being selected from a group including zinc, cadmium, magnesium, manganese, and mercury and B being selected from a group including oxygen, sulfur, selenium, tellurium, and polonium;
- a third semiconductor layer including a wide bandgap p-type semiconductor adapted to the photovoltaic device;
- and
- a metal electrode.
12 more elements
A photovoltaic device comprising:
- a substrate;
- a transparent conductive layer residing over the substrate;
- a rectifying heterojunction including:
- a first semiconductor layer residing over the transparent conductive layer, the first transparent semiconductor layer including:
- a wide bandgap n-type semiconductor having a bandgap greater than 2.4 eV;
- a III-V compound or alloys thereof, the III-V compound including:
- a XY chemical formula, the X being selected from a group including boron, aluminum, gallium, indium, and thallium, and the Y being selected from a group including nitrogen, phosphorus arsenic, antimony, and bismuth;
- an n-type CdS interfacial layer residing over the first semiconductor layer;
- a CdTe second semiconductor layer residing over the n-type interfacial layer, the second semiconductor layer including:
- a thickness of up to 2 μm;
- a II-VI compound or alloys thereof, the II-VI compound including:
- a AB chemical formula, A being selected from a group including zinc, cadmium, magnesium, manganese, and mercury and B being selected from a group including oxygen, sulfur, selenium, tellurium, and polonium;
- a p-type interfacial layer residing over the second semiconductor layer;
- and
- a metal electrode residing over the second semiconductor layer.
12 more elements
Dependencies are inferred from the claim text.