All-Inorganic Cs 2 AgInBr 6 / RbGeI 3 PSCs incorporating a p + -MoS 2 TRL

Abstract Growing interest in sustainable energy technologies has driven intensive studies on perovskite solar cells (PSCs). Nevertheless, the inclusion of lead in traditional PSCs raises serious issues related to environmental safety and human health. To overcome the above limitations, simulation analysis is carried out using SCAPS-1D, and a novel lead-free, all-inorganic FTO / ZnO / Cs 2 AgInBr 3 / p + -MoS 2 / RbGeI 3 / MoO 3 PSCs structure is designed. p + -MoS2 serves as the tunnel recombination layer (TRL), reducing valence band offset, promoting tunneling recombination, and suppressing interfacial defects. By optimizing the absorber layer thickness, doping concentration, and TRL thickness, the final device’s power conversion efficiency (PCE) was enhanced from 11.59% to 20.17%.