Batteries: thermoelectric and photoelectric – Photoelectric – Cells
Patent
1979-05-29
1981-06-16
Rutledge, L. Dewayne
Batteries: thermoelectric and photoelectric
Photoelectric
Cells
29572, 34 4, 34 18, 136256, 136258, 136261, 148 15, 148174, 148175, 148188, 219 1055M, 219 1055R, 357 30, 357 59, 357 65, 427 451, 427 46, H01L 3104, H01G 920, H01L 21225
Patent
active
042739500
ABSTRACT:
Solar cells are fabricated by spraying a dopant coating onto a semiconductor wafer and heating the surface of the wafer using unipolar microwaves. The resultant controlled heating drives dopant atoms from the coating into the wafer to produce a shallow junction at a selectable depth. Advantageously, metallic conductors are predeposited atop the dopant coating and then sintered to the semiconductor by the same unipolar microwave field concurrently with dopant drive-in. Efficient solar cells can be made with this process using polycrystalline silicon, since with unipolar microwave surface heating the grain boundaries do not become so deeply doped as to short circuit the junctions formed in the individual grains. Unipolar microwave heating also may be used to anneal ion implanted semiconductor devices.
REFERENCES:
patent: 3306835 (1967-02-01), Magnus
patent: 3351503 (1967-11-01), Fotland
patent: 3502516 (1970-03-01), Henker
patent: 3551199 (1970-12-01), Forster
patent: 3914856 (1975-10-01), Fang
patent: 3990097 (1976-11-01), Lindmayer
patent: 4086102 (1978-04-01), King
patent: 4104091 (1978-08-01), Evans et al.
patent: 4147563 (1979-04-01), Narayan et al.
patent: 4152535 (1979-05-01), Deminet et al.
patent: 4153907 (1979-05-01), Kofron
patent: 4163678 (1979-08-01), Frosch et al.
Kirkpatrick et al., "Silicon Solar Cells . . . Processing", IEEE Trans. on Electron Devices, vol. ED-24, No. 4, Apr. 1977, pp. 429-432.
Runge, Dr. H., "Threshold Voltage . . . Ion Implantation ", Electronic Eng., Jan. 1976, pp. 41-43.
Brodsky, M. H., "Making Higher Efficiency Solar Cells . . . -", IBM Tech. Discl. Bull., vol. 18, No. 2, Jul. 1975, pp. 582-583.
Joshi et al., "Masking Technique For Laser Induced Diffusion".
vol. 13, No. 4, Sep. 1970, p. 928.
von Gutfeld, R. J., "Crystallization of Silicon for Solar Cell Applications", I.B.M. Tech. Discl. Bull., vol. 19, No. 10, Mar. 1977, pp. 3955-3956.
Photowatt International, Inc.
Rutledge L. Dewayne
Saba W. G.
LandOfFree
Solar cell and fabrication thereof using microwaves does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Solar cell and fabrication thereof using microwaves, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solar cell and fabrication thereof using microwaves will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-156394