Integral Glass Covers for Silicon Solar Cells
Final technical rept. 19 May 1971-31 Oct 1974
GENERAL ELECTRIC CO PHILADELPHIA PA SPACE DIV
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A program of inorganic glass development resulting in the formulation of numerous compositions for direct fusion to silicon solar cells was conducted. The glasses were sedimented as -200 mesh particles onto the front surface of the solar cells, then fused, to form an integral cover, at temperatures ranging from 510C to 600C depending on solar cell type and glass composition. Coatings, at least 50 microns thick, were applied to both NP aluminum -contacted and silvertitanium-contacted cells. Electrical characterization of the bare and coated cells, before and after electron irradiation, shows that some cells can be integrally covered by this technique without degrading their conversion efficiency below an acceptable level. Glass preparation, compositional modifications, and the effect of these changes on fusion temperature, radiation resistance, transmission, and thermal expansion are discussed.
- Electric Power Production and Distribution
- Ceramics, Refractories and Glass