Thin film heterojunction photovoltaic cells and methods of makin

Details Thin film heterojunction photovoltaic cells and methods of makin Thin film heterojunction photovoltaic cells and methods of makin

1981-09-08

1983-06-14

Weisstuch, Aaron

Batteries: thermoelectric and photoelectric

Photoelectric

Cells

136264, 204 37R, 204 40, 148 15, 357 16, 357 30, H01L 3106, H01L 3118, C25D 550, C25D 904

Patent

active

043884830

ABSTRACT:
A method of fabricating a thin film heterojunction photovoltaic cell which comprises depositing a film of a near intrinsic or n-type semiconductor compound formed of at least one of the metal elements of Class II B of the Periodic Table of Elements and at least tellurium and then heating said film at a temperature between about 250.degree. C. and 500.degree. C. for a time sufficient to convert said film to a suitably low resistivity p-type semiconductor compound. Such film may be deposited initially on the surface of an n-type semiconductor substrate. Alternatively, there may be deposited on the converted film a layer of n-type semiconductor compound different from the film semiconductor compound. The resulting photovoltaic cell exhibits a substantially increased power output over similar cells not subjected to the method of the present invention.

REFERENCES:
patent: 4207119 (1980-06-01), Tyan
patent: 4231808 (1980-11-01), Tabei et al.
patent: 4260427 (1981-04-01), Fulop et al.
H. Serreze et al., "Spray Pyrolysis Prepared CdTe Solar Cells", Conf. Record, 15th IEEE Photovoltaic Specialists Conf., (1981), pp. 1068-1072.
Y. Y. Ma et al., "Photovoltaic Properties of n-CdS/p-CdTe Heterojunctions Prepared by Spray Pyrolysis", Appl. Phys. Lett., vol. 30, pp. 423-424, (1977).
K. Yamaguchi et al., "Photovoltaic Effect in CdTe-CdS Junctions Prepared by Vapour Phase Epitaxy", Japan. J. Appl. Phys., vol. 15, pp. 1575-1576, (1976).
E. I. Adirovich et al., "Photoelectric Effects in Film Diodes With CdS-CdTe Heterojunctions", Soviet Physics-Semiconductors, vol. 3, Jul. 1969, pp. 61-64.
N. Nakayama et al., "Screen Printed Thin Film CdS/CdTe Solar Cell", Japan. J. Appl. Phys., vol. 19, pp. 703-712, (1980).

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