Metal treatment – Compositions – Heat treating
Patent
1981-03-23
1983-07-26
Roy, Upendra
Metal treatment
Compositions
Heat treating
29576B, 29584, 148187, 357 30, 357 91, H01L 21263, C03C 304
Patent
active
043952933
ABSTRACT:
A method is provided for accelerating and improving the recovery of GaAs solar cells from the damage which they experience in space under high energy particle irradiation scuh as electrons, protons and neutrons. The method comprises combining thermal annealing with injection annealing. Injection annealing is the recovery from radiation damage resulting from minority carrier injection into the damaged semiconductor, nonradiative minority carrier combination of the injected minority carriers, transfer of the recombination energy to the crystal lattice and utilization of this energy to remove the defects caused by the high energy particle irradiation. The combined annealing of this invention is implemented by heating the solar cells to a moderate temperature (on the order of about 200.degree. C. to 300.degree. C. or less), while at the same time injecting the minority carriers by either of two methods: current injection (by applying an adequate forward bias voltage) or photo-injection (by exposing the cell to adequate light intensity). Sunlight directed onto the solar cells may be employed for heating the solar cells. Alternatively, energy dissipation in the solar cells caused by the flow of a forward bias current may be used to heat the solar cells.
REFERENCES:
patent: 3333326 (1967-08-01), Thomas, Jr.
patent: 3570112 (1971-03-01), Barry et al.
patent: 3895430 (1975-07-01), Wilson et al.
patent: 4043836 (1977-08-01), Sun
patent: 4044372 (1977-08-01), Weinstein
patent: 4116721 (1978-09-01), Ning et al.
patent: 4137099 (1979-01-01), Sun
patent: 4210464 (1980-07-01), Tanaka et al.
patent: 4230791 (1980-10-01), Chu et al.
patent: 4238694 (1980-12-01), Kimmerling et al.
Lang et al., Phys. Rev. Letts. 33 (1974) 489.
Lang et al., Jour. Appl. Phys. 47 (1976) 3587.
Lang et al., Phys. Rev. B 15 (1977) 4874.
Thommen, Radiation Effects, 2 (1970) 201.
Grimshaw, Radiation Effects, 12 (1972) 87.
Suski et al., Radiation Effects, 29 (1976) 137.
Kamath G. Sanjiv
Knechtli Ronald C.
Loo Robert Y.
Collins D. W.
Hughes Aircraft Company
Karambelas A. W.
Moore J. D.
Roy Upendra
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