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N-I-P Micromorph Solar Cells on Aluminium Substrates

Published online by Cambridge University Press:  15 February 2011

M. Goetz ,
P. Torres ,
P. Pernet ,
J. Meier ,
D. Fischer ,
H. Keppner  and
A. Shah
M. Goetz
Affiliation:
Institut de Microtechnique (IMT) de l'Université de Neuchâtel, Rue Breguet 2, CH-2000 Neuchâtel, Switzerland, [email protected]
P. Torres
Affiliation:
Institut de Microtechnique (IMT) de l'Université de Neuchâtel, Rue Breguet 2, CH-2000 Neuchâtel, Switzerland, [email protected]
P. Pernet
Affiliation:
Institut de Microtechnique (IMT) de l'Université de Neuchâtel, Rue Breguet 2, CH-2000 Neuchâtel, Switzerland, [email protected]
J. Meier
Affiliation:
Institut de Microtechnique (IMT) de l'Université de Neuchâtel, Rue Breguet 2, CH-2000 Neuchâtel, Switzerland, [email protected]
D. Fischer
Affiliation:
Institut de Microtechnique (IMT) de l'Université de Neuchâtel, Rue Breguet 2, CH-2000 Neuchâtel, Switzerland, [email protected]
H. Keppner
Affiliation:
Institut de Microtechnique (IMT) de l'Université de Neuchâtel, Rue Breguet 2, CH-2000 Neuchâtel, Switzerland, [email protected]
A. Shah
Affiliation:
Institut de Microtechnique (IMT) de l'Université de Neuchâtel, Rue Breguet 2, CH-2000 Neuchâtel, Switzerland, [email protected]
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Abstract

The first successful deposition of ‘micromorph’ silicon tandem solar cells of the n-i-p-n-i-p configuration is reported. In order to implement the ‘micromorph’ solar cell concept, four key elements had to be prepared: First, the deposition of mid-gap, intrinsic microcrystalline silicon (μc-Si:H) by the 'gas purifier method', second, the amorphous silicon (a-Si:H) n-i-p single junction solar cell, third, the microcrystalline silicon n-i-p single junction solar cell and fourth, the ability of depositing on aluminium sheet substrates.

All the solar cells presented have been deposited on flat aluminium sheets, using a single layer antireflection coating to couple the light into the cell. It is shown, that this antireflection concept- together with a flat substrate- holds for amorphous single junction solar cells, but it reaches its limit with the extended range of spectral response of the ‘micromorph’ cell.

The best initial efficiencies for each category of n-i-p cells on flat substrates were: 8.7% for the amorphous silicon single junction cell, 4.9% for the microcrystalline silicon single junction cell and 9.25% for the ‘micromorph’ tandem cell.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 452 , 1996 , 877
Copyright
Copyright © Materials Research Society 1997

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References

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