Photoelectric conversion device

Details Photoelectric conversion device Photoelectric conversion device

1979-10-16

1981-03-17

Weisstuch, Aaron

Batteries: thermoelectric and photoelectric

Photoelectric

Cells

106 114, 106 119, 106 126, 252514, 357 30, 357 67, 427 88, H01L 3100

Patent

active

042565138

ABSTRACT:
A photoelectric conversion device such as a solar cell in which electrodes formed from a conductive paste make ohmic contact with the surfaces of impurity diffused layers respectively formed in a semiconductor substrate. The conductive paste contains ultrafine particles of silver and gold as its principal solid components. The conductive paste further contains, as its additional principal solid components, ultrafine particles of a metal having a eutectic temperature lower than that of silver when alloyed with the semiconductor and a powdery glass material not containing any lead oxide glass component. The electrodes provided by the conductive paste exhibit excellent electrical properties when the conductive paste is subjected to firing treatment at a temperature of about 600.degree. C. Thus, when, for example, the semiconductor substrate is of n-type silicon and a p.sup.+ -type diffused layer is formed in one of its major surfaces to form a p.sup.+
junction of relatively small depth, the electrode making ohmic contact with the p.sup.+ -type diffused layer does not penetrate through the p.sup.+
junction and has a low contact resistance. The photoelectric conversion device such as the solar cell thus obtained can operate with a higher conversion efficiency than hitherto and can be manufactured at a lower cost than hitherto.

REFERENCES:
patent: 4153907 (1979-05-01), Kofron
patent: 4163678 (1979-08-01), Bube
patent: 4165241 (1979-08-01), Yerkes et al.
E. L. Ralph, "Recent Advances in Low Cost Solar Cell Processing", Cont. Record, 11th IEEE Photovoltaic Specialists' Conf. (1975), pp. 315-316.
M. B. Field et al., "Application of Thick-Film Technology to Solar Cell Fabrication", Conf. Record, 12th IEEE Photovoltaic Specialists Conf. (1976), pp. 303-308.
A. D. Haigh, "Fired Through Printed Contacts on Antireflection Coated Silicon Terrestrial Solar Cells", Conf. Record, 12th IEEE Photovoltaic Specialists Conf. (1976), pp. 360-361.
L. Frisson et al., "Screen Printed Contacts on Silica Solar Cells with Low Series Resistance", Conf. Record, 13th IEEE Photovoltaic Specialists Conf. (1978), pp. 590-592.

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