New study confirms sensitivity of heterojunction solar cells to soldering flux

Researchers in South Korea have found that the contamination by small amounts of soldering flux residues during heterojunction PV module manufacturing can induce significant long-term performance degradation. Careful control of flux application methods and incorporating drying steps are proposed as potential solutions. A group of researchers from the Korea Electronics Technology Institute (KETI) has investigated how commercially available solder fluxes can corrode indium tin oxide (ITO) electrodes in heterojunction (HJT) solar cells and have found that there is a significant risk of early degradation ...

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