Thin film photovoltaic cells having increased durability and ope

Details Thin film photovoltaic cells having increased durability and ope Thin film photovoltaic cells having increased durability and ope

1979-05-29

1980-12-16

Weisstuch, Aaron

Batteries: thermoelectric and photoelectric

Photoelectric

Cells

136265, 136260, 29572, 427 74, 427 76, 4272481, 357 30, 357 52, 357 73, 204192SP, H01L 3106, B05D 512

Patent

active

042395534

ABSTRACT:
A solar cell having a copper-bearing absorber is provided with a composite transparent encapsulating layer specifically designed to prevent oxidation of the copper sulfide. In a preferred embodiment, the absorber is a layer of copper sulfide and the composite layer comprises a thin layer of copper oxide formed on the copper sulfide and a layer of encapsulating glass formed on the oxide. It is anticipated that such devices, when exposed to normal operating conditions of various terrestrial applications, can be maintained at energy conversion efficiencies greater than one-half the original conversion efficiency for periods as long as thirty years.

REFERENCES:
patent: 3888697 (1975-06-01), Bogus et al.
F. A. Shirland et al., "Materials for Low-Cost Solar Cells," Rep. Prog. Phys., vol. 41, pp. 1857-1873 (1978).
R. B. Hall et al., "The Design & Fabrication of High Efficiency Thin Film CdS/Cu.sub.2 S Solar Cells," Thin Solid Films, vol. 63, pp. 203-211 (1979).
K. A. Andrianov et al., "Stabilization of The Characteristics of CdS Film Photoconverters," Applied Solar Energy, vol. 11, pp. 61-64 (1975).
A. M. Barnett et al., "Advances in the Development of Efficient Thin Film CdS/Cu.sub.2 S Solar Cells," Conf. Record, 12th IEEE Photovoltaic Specialists Conf. (1976), pp. 544-546.
Memorandum, University of Delaware, Anthony Catalano to Dr. George Warfield, Oct. 10, 1975.
W. Arndt et al., "CdS-Cu.sub.2 S Thin Film Solar Cells for Terrestrial Applications," Proceedings Int'l Solar Energy Conf., Luxembourg (1977), Reidel Pub. Co. (1978), pp. 547-556.
K. Bogus et al., "High Efficiency Cu.sub.2 S-CdS Solar Cells with Improved Thermal Stability," Conf. Record, 9th IEEE Photovoltaic Specialists Conf. (1972), pp. 106-110.
H. M. Windawi, "Stoichiometric Effects & Carrier Density of Cu.sub.x S," Presented at 1st Int'l Workshop on CdS Solar Cells, Newark, Del., Apr.-May 1975, pp. 177-190.
G. H. Hewig et al., "The Influence of the Horizontal & Vertical Structure of the p-n Junction in Cu.sub.2 S-CdS Solar Cells," Conf. Record, 12th IEEE Photovoltaic Specialists Conf. (1976), pp. 483-487.
F. Pfisterer et al., "Performance of Cu.sub.x S-CdS Solar Cells After Additional Cu Treatment," Conf. Record, 11th IEEE Photovoltaic Specialists Conf. (1975), pp. 460-463.
F. Pfisterer et al., "Post-Fabrication Treatments, Surface Properties, and Front Contact of Cu.sub.x S-CdS Solar Cells," Conf. Record, 12th IEEE Photovoltaic Specialists Conf., (1976), pp. 502-507.

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