Macroporous Si as an absorber for thin-film solar cells
We separate 15 ?m to 32 ?m thick macroporous Si films from n-type crystalline Si wafers by electrochemical etching under back-side illumination. These layers are surface passivated and have openings in the oxide, for local doping and contacting, over 1% of the cell area. We measure effective lifetimes within a range of 2 to 3 ?s. With an analytical model for the effective lifetime in macroporous Si we find an average surface recombination velocity of 75 cm/s, dominantly caused by the contact...[Show more]
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|Source:||Physica Status Solidi: Rapid Research Letters|
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