prov:value
| - Generally, the present invention is also directed to photovoltaic cells comprising a rear surface metal layer, the rear surface metal layer comprising a first layer and a second layer, the first layer comprising particles comprising or consisting of (i) B, Al, Ga, In, and/or Tl or (ii) P, As, Sb, and/or Bi, the second layer comprising particles comprising or consisting of any metal, for example Al
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