Photoelectric conversion element having a surface member or a protection member and building material using the same
First Claim
1. A photoelectric conversion element comprising a substrate, a plurality of semiconductor junctions made of non-single-crystalline semiconductors formed on said substrate, and a surface material covering said semiconductor junctions;
- wherein said semiconductor junctions have respective absorption spectra different from each other and respective photo-deterioration rates different from each other, and a photo-current generated by the semiconductor junction of the least deterioration rate is larger than that generated by the semiconductor junction of the greatest deterioration rate in a state of absence of said surface material, andwherein said surface material absorbs light in a range corresponding to a part of the absorption spectrum of the semiconductor junction of the least deterioration rate, so that the photo-current generated by said semiconductor junction of the least deterioration rate becomes smaller than that generated by the semiconductor junction of the greatest deterioration rate.
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Accused Products
Abstract
A photoelectric conversion element comprising a substrate, a plurality of semiconductor junctions made of non-single-crystalline semiconductors formed on the substrate, and a surface material covering the semiconductor junctions is provided. The semiconductor junctions have respective absorption spectra different from each other and respective photo-deterioration rates different from each other. A photo-current generated by the semiconductor junction of the least deterioration rate is larger than that by the semiconductor junction of the greatest deterioration rate when no surface material is present, and when present, the surface material absorbs light in a range corresponding to a part of the absorption spectrum of the semiconductor junction of the least deterioration rate, so that the photo-current generated by the semiconductor junction of the least deterioration rate becomes smaller than that by the semiconductor junction of the greatest deterioration rate.
54 Citations
23 Claims
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1. A photoelectric conversion element comprising a substrate, a plurality of semiconductor junctions made of non-single-crystalline semiconductors formed on said substrate, and a surface material covering said semiconductor junctions;
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wherein said semiconductor junctions have respective absorption spectra different from each other and respective photo-deterioration rates different from each other, and a photo-current generated by the semiconductor junction of the least deterioration rate is larger than that generated by the semiconductor junction of the greatest deterioration rate in a state of absence of said surface material, and wherein said surface material absorbs light in a range corresponding to a part of the absorption spectrum of the semiconductor junction of the least deterioration rate, so that the photo-current generated by said semiconductor junction of the least deterioration rate becomes smaller than that generated by the semiconductor junction of the greatest deterioration rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A photoelectric conversion element wherein when a light incident surface of a photoelectric conversion section comprising a plurality of non-single-crystalline semiconductor junctions and having a transparent, conductive layer thereon is exposed to light without a protection member, a photo-current generated by the semiconductor junction having best property is greater than that generated by at least one of the other semiconductor junctions and wherein when the light incident surface is exposed to light with a protection member having a transmittance of 0 to 90% for light in a specific wavelength range, a photo-current generated by the semiconductor junction having the best property is always smaller than those generated by the other semiconductor junctions upon subjection to a deterioration test.
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14. A photoelectric conversion element wherein a photo-current generated by a semiconductor junction having best property is 0 to 6% larger than that generated by at least one of other semiconductor junctions and wherein under irradiation with light in a state of presence of a protection member having a transmittance of 0 to 90% for light in a specific wavelength range a photo-current generated by the semiconductor junction having the best property is always smaller than those generated by the other semiconductor junctions upon subjection to a deterioration test.
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15. A building material comprising:
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a) a photoelectric conversion element comprising a substrate, and a plurality of semiconductor junctions made of non-single-crystalline semiconductors formed on said substrate; wherein said semiconductor junctions have respective absorption spectra different from each other and respective photo-deterioration rates different from each other, and a photo-current generated by the semiconductor junction of the least deterioration rate is larger than that generated by the semiconductor junction of the greatest deterioration rate in a state of absence of said surface material, and wherein said surface material absorbs light in a range corresponding to a part of the absorption spectrum of the semiconductor junction of the least deterioration rate, so that the photo-current generated by said semiconductor junction of the least deterioration rate becomes smaller than that generated by the semiconductor junction of the greatest deterioration rate; and b) a back material provided on a back surface of said photoelectric conversion element. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A power generation apparatus comprising:
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a) a photoelectric conversion element comprising a substrate, a plurality of semiconductor junctions made of non-single-crystalline semiconductors formed on said substrate, and a surface material covering said semiconductor junctions; wherein said semiconductor junctions have respective absorption spectra different from each other and respective photo-deterioration rates different from each other, and a photo-current generated by the semiconductor junction of the least deterioration rate is larger than that generated by the semiconductor junction of the greatest deterioration rate in a state of absence of said surface material, and wherein said surface material absorbs light in a range corresponding to a part of the absorption spectrum of the semiconductor junction of the least deterioration rate, so that the photo-current generated by said semiconductor junction of the least deterioration rate becomes smaller than that generated by the semiconductor junction of the greatest deterioration rate; and b) power converting means for converting power generated by said photoelectric conversion element. - View Dependent Claims (22, 23)
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Specification