فهرست نشریات علمی دسترسی آزاد ایران

The modification of PEDOT: PSS with dimethyl sulfoxide (DMSO) has emerged as a key strategy to enhance the electrical, morphological, and interfacial properties of hole transport layers (HTLs) in perovskite solar cells (PSCs). This study investigates the chemical interactions between DMSO and PEDOT: PSS, highlighting how DMSO selectively interacts with PSS chains, facilitating phase segregation and improving PEDOT-rich domain connectivity. These modifications lead to a significant increase in electrical conductivity (from ~1.6 S/cm to ~97 S/cm) and hole mobility, as confirmed by SCAPS-1D simulations. As a result, power conversion efficiency (PCE) improvements of up to 5% are observed, along with better film stability, wettability, and reduced recombination losses. The findings demonstrate that DMSO doping enhances charge extraction, reduces series resistance, and extends the operational lifetime of PSCs, making this approach highly promising for next-generation solar technologies.