Grooved substrate exposes back surface of photovoltaic cells, allowing dopant diffusion into surface and electrical contact. When substrate is coated successively with carbon and molten silicon, polycrystalline-silicon bridges form over grooves, but leave channels open. Best adhesion results when substrate grooves run perpendicular to direction of liquid-silicon layer and are closely spaced.
Back contacts for silicon-on-ceramic solar cells
NASA Tech Briefs ; 5 , 4
1981-04-01
Miscellaneous
No indication
English
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