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US 6,639,143 B2Granted
Solar cell using ferroelectric material(s)
AssigneeSamsung SDI Co., Ltd.
InventorsJeong Kim, Dong-Seop Kim, Soo-Hong Lee
Life of this patent
Estimating the term…
Abstract
A solar cell using a ferroelectric material(s) is provided with a ferroelectric layer at the front surface or the rear surface thereof, or at the front and the rear surfaces thereof. The ferroelectric layer is formed with a ferroelectric material such as BaTiO3, BST((Ba,Sr)TiO3), PZT((Pb,Zr)TiO3) and SBT(SrBi2Ta2O7).
Claims20
A solar cell, comprising:
- a semiconductor substrate of a first conductive type;
- a semiconductor layer of a second conductive type formed on a front surface of said first conductive type semiconductor substrate, the first and the second conductive types being opposite to each other in polarity, a pn junction formed at the interface between said first conductive type semiconductor substrate and said second conductive type semiconductor layer;
- a front electrode contacted with a portion of said second conductive type semiconductor layer;
- a rear electrode contacted with a portion of said first conductive type semiconductor substrate;
- a ferroelectric layer formed on at least one of a front surface of said second conductive type semiconductor layer and a rear surface of said first conductive type semiconductor substrate;
- and
- a poling electrode formed on at least a part of said ferroelectric layer.
4 more elements
A solar cell, comprising:
- a semiconductor substrate of a first conductive type;
- a semiconductor layer of a second conductive type formed on a front surface of said first conductive type semiconductor substrate, the first and the second conductive types being opposite to each other in polarity, a pn junction formed at the interface between said first conductive type semiconductor substrate and said second conductive type semiconductor layer;
- a ferroelectric layer formed on a front surface of said second conductive type semiconductor layer;
- a poling electrode formed on at least a part of said ferroelectric layer;
- a surface oxide layer formed on a rear surface of said first conductive type semiconductor substrate;
- a plurality of grooves formed at a front surface of said ferroelectric layer and a rear surface of said surface oxide layer, with a predetermined depth to expose said semiconductor substrate;
- and
- front and rear electrodes comprising a conductive material filling the plurality of grooves.
5 more elements
A solar cell, comprising:
- a semiconductor substrate of a first conductive type;
- a semiconductor layer of a second conductive type formed on a front surface of said first conductive type semiconductor substrate, the first and the second conductive types being opposite to each other in polarity, a pn junction formed at the interface between said first conductive type semiconductor substrate and said second conductive type semiconductor layer;
- a ferroelectric layer formed on a rear surface of said first conductive type semiconductor substrate;
- a poling electrode formed on at least a part of said ferroelectric layer;
- a plurality of grooves formed at a front surface of said second conductive type semiconductor layer and a rear surface of said ferroelectric layer, with a predetermined depth to expose said semiconductor substrate;
- and
- front and rear electrodes comprising a conductive material filling the plurality of grooves.
4 more elements
A solar cell, comprising:
- a semiconductor substrate of a first conductive type;
- a semiconductor layer of a second conductive type formed on a front surface of said first conductive type semiconductor substrate, the first and the second conductive types being opposite to each other in polarity, a pn junction formed at the interface between said first conductive type semiconductor substrate and said second conductive type semiconductor layer;
- and
- a ferroelectric layer formed on at least one of a front surface of said second conductive type semiconductor layer and a rear surface of said first conductive type semiconductor substrate.
1 more element
Dependencies are inferred from the claim text.