Enhanced Dye-Sensitized Solar Cells via MoS2 Nanosheets-Modified TiO2 Photoanodes

Molybdenum disulfide (MoS2), is a novel 2-D material, has recently garnered significant attention. In this study, MoS2 nanosheets (NSs) were synthesized via a liquid-phase exfoliation (LPE) method, and subsequently used to modify the titanium dioxide (TiO2) photoanode of dye-sensitized solar cells (DSSCs). The incorporation of MoS2 NSs not only enhances dye adsorption due to their high specific surface area but also reduces the carrier recombination rate attributed to their excellent carrier mobility. These combined effects contribute to an improvement in the photovoltaic conversion efficiency (PCE) of DSSCs. Notably, the efficiency of DSSCs with MoS2 modification increased from 4.99% to 6.55%, representing a 31% improvement.