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US 10,854,765 B2Granted
Voltage-mode photosensitive device
AssigneeEmberion Oy
InventorsMark Allen, Alexander Bessonov, Tapani Ryhänen
Life of this patent
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Abstract
A photosensitive device that includes a conductive electrode, a dielectric layer, a sensing electrode composed of a two-dimensional layered material, and a photoactive layer which can be configured to absorb electromagnetic radiation. The photosensitive device also includes a single-ended measurement electrode for determining the electric potential of the sensing electrode.
Claims13
A photosensitive device located on a first region of a horizontal substrate surface, the photosensitive device comprising:
- a substantially horizontal first conductive electrode with a first side and a second side, which overlies at least the first region;
- a substantially horizontal first dielectric layer with a first side and a second side, wherein the first side of the first dielectric layer is in contact with the second side of the first conductive electrode at least in an area which overlies the first region;
- a substantially horizontal sensing electrode with a first side and a second side, wherein the sensing electrode consists of a two-dimensional layered material, and the first side of the sensing electrode is in contact with the second side of the first dielectric layer at least in an area which overlies the first region;
- a substantially horizontal photoactive layer with a first side and a second side, wherein the photoactive layer consists of a semiconducting material which can be configured to absorb electromagnetic radiation, and the first side of the photoactive layer is in contact with the second side of the sensing electrode at least in an area which overlies the first region;
- and
- a single-ended measurement electrode for determining the electric potential of the sensing electrode, wherein the measurement electrode is in contact with either the first side or the second side of the sensing electrode in an area which overlies a contact region on the horizontal substrate surface.
3 more elements
A photodetector, comprising:
- an array of two or more photosensitive devices on a horizontal substrate surface which comprises two or more first regions, where each photosensitive device is located on a first region;
- one or more substantially horizontal first conductive electrodes and one or more substantially horizontal first dielectric layers, wherein each first conductive electrode and each first dielectric layer has a first side and a second side, and the first side of each first dielectric layer is in contact with the second side of the corresponding first conductive electrode at least in an area which overlies one or more first regions on the substrate surface;
- a substantially horizontal sensing electrode overlying each first region, so that each sensing electrode is dedicated to a specific first region, wherein each sensing electrode consists of a two-dimensional layered material, and each sensing electrode has a first side and a second side, and the first side of each sensing electrode is in contact with the second side of the corresponding first dielectric layer in an area which overlies the corresponding first region;
- one or more substantially horizontal photoactive layers, wherein each photoactive layer has a first side and a second side, and the first side of each photoactive layer is in contact with the second side of at least one sensing electrode in areas which overlie at least one first region on the substrate surface,
- wherein each photosensitive device comprises a single-ended measurement electrode for determining the electric potential of the corresponding sensing electrode, and the single-ended measurement electrode is in contact with either the first or the second side of the corresponding sensing electrode in an area which overlies a contact region on the horizontal substrate surface.
2 more elements
Dependencies are inferred from the claim text.