Promoting charge separation via Mn-modified porous carbon heterojunctions for enhanced solar cell performance

This study constructed a Mn-modified heterojunction at the Cs 2 AgInCl 6 /carbon interface, boosting lead-free perovskite solar cell efficiency to 8.12 %. The interface simultaneously optimized band alignment to suppress charge recombination and passivated In 3+ defects via Mn–O bonds, extending the average carrier lifetime from 5.46 to 8.24 ns. This strategy provides a new approach for designing efficient, stable lead-free perovskite devices.