Back-contact vertical-junction solar cell and method

Details Back-contact vertical-junction solar cell and method Back-contact vertical-junction solar cell and method

1990-06-08

1991-11-26

Weisstuch, Aaron

Batteries: thermoelectric and photoelectric

Photoelectric

Cells

136256, 357 30, 357 55, 156647, 437 2, H01L 31068, H01L 3118

Patent

active

050679856

ABSTRACT:
An interdigitated back-contact vertical-junction solar cell which utilizes an anisotropically etched 110-oriented silicon crystal wafer. The cell structure includes rounded corner top edges of the between cell channel walls in order to improve light capturing ability and also has pn-junctions disposed over all of the cavity internal surfaces. Additional pn-junctions are located on the rear surface of the cell array to assist in generated carrier collection into a rear mounted metallic conductor grid. The disclosed cell has desirable transducer efficiency, without the use of anti-reflection coatings, and previous improved physical robustness, and radiation hardening. Fabrication of the cell array includes an isotropic etch of the cell dividers and the anisotropic etching to form cell cavities.

REFERENCES:
patent: 3690953 (1970-09-01), Wise
patent: 4101351 (1978-07-01), Shah et al.
patent: 4409423 (1983-10-01), Holt
patent: 4420650 (1983-12-01), Wise et al.
patent: 4427839 (1984-01-01), Hall
patent: 4478879 (1984-10-01), Baraona et al.
W.W. Lloyd, Conference Record, 11th IEEE Photovoltaic Specialists Conference, (1975) pp. 349-355.

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