Micro/nanostructure PN junction diode array thin-film solar cell and method for fabricating the same
First Claim
1. A micro/nanostructure PN junction diode array thin-film solar cell comprisinga first transparent substrate;
- a thin-film N-type semiconductor joined to said first transparent substrate;
a semiconductor micro/nanostructure array with one side thereof joined to said thin-film N-type semiconductor;
a thin-film P-type semiconductor joined to another side of said semiconductor micro/nanostructure array; and
a second transparent substrate joined to said thin-film P-type semiconductor.
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Abstract
The present invention discloses a micro/nanostructure PN junction diode array thin-film solar cell and a method for fabricating the same, wherein a microstructure or sub-microstructure PN junction diode array, such as a nanowire array or a nanocolumns array, is transferred from a source-material wafer to two pieces of transparent substrates, which are respectively corresponding to two electric conduction types, to fabricate a thin-film solar cell. In the present invention, the micro/nanostructure PN junction diode array has advantages of a fine-quality crystalline semiconductor, and the semiconductor substrate can be reused to save a lot of semiconductor material. Besides, the present invention can make the best of sunlight energy via stacking up the solar cells made of different types of semiconductor materials to absorb different wavebands of the sunlight spectrum.
33 Citations
22 Claims
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1. A micro/nanostructure PN junction diode array thin-film solar cell comprising
a first transparent substrate; -
a thin-film N-type semiconductor joined to said first transparent substrate; a semiconductor micro/nanostructure array with one side thereof joined to said thin-film N-type semiconductor; a thin-film P-type semiconductor joined to another side of said semiconductor micro/nanostructure array; and a second transparent substrate joined to said thin-film P-type semiconductor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for fabricating a micro/nanostructure PN junction diode array thin-film solar cell comprising steps:
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providing a source-material wafer having a semiconductor micro/nanostructure array; coating a thin-film N-type semiconductor on a first transparent substrate; making said semiconductor micro/nanostructure array contact said thin-film N-type semiconductor of said first transparent substrate; fusing together said thin-film N-type semiconductor and one side of said semiconductor micro/nanostructure array; detaching said semiconductor micro/nanostructure array and transferring said semiconductor micro/nanostructure array to said first transparent substrate; coating a thin-film P-type semiconductor on a second transparent substrate; making said semiconductor micro/nanostructure array contact said thin-film P-type semiconductor of said second transparent substrate; and fusing together said thin-film P-type semiconductor and another side of said semiconductor micro/nanostructure array to form said micro/nanostructure PN junction diode array thin-film solar cell. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification