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3% for a [Formula see text] BJ cell and 2.2% for a [Formula see text] IBC cell in comparison to PERC. For these structures further research on poly-Si structuring and screen-printing on p-type poly-Si is necessary.Biochar from sewage sludge is a low-cost sorbent that may be used for several environmental functions. This study evaluates the induced effects of pyrolysis temperature on the physicochemical characteristics of sewage sludge (SS) biochar produced at 350 (SSB35, 450 (SSB45 and 600 (SSB60, based on the metal enrichment index