Effects of constituents in paste on low light performances of silicon solar cells

Solar cell performances at low light intensity are practically important for power generation capacity in the entire life cycle. Our study has clarified with floating contact method that glass frit, which is an indispensable constituent for silver paste for contact, causes drastic shunts and recombination in the solar cells. In this study, the effects of the glass frit "itself" on the low light performances of the cells are investigated. In conclusion, the glass frit makes the low light performances of the cells lower, especially open-circuit voltage and fill factor, due to its effects on the shunts and recombination.