Kesterite tech news
On October 28, 2026, researchers published a study in Materials for Renewable and Sustainable Energy presenting an interface--engineering framework to overcome key performance bottlenecks in kesterite (Cu₂ZnSnS₄ or CZTS) thin--film solar cells. Addressing environmental toxicity and carrier recombination issues inherent to conventional architectures, the team utilized technology computer--aided design (TCAD) simulations to systematically evaluate cadmium--free buffer layers—such as In₂S₃, ZnS, ZnS₀.₅O₀.₅, and SnS₂—alongside back--contact modifications. The findings demonstrate that inserting an optimized, ultrathin molybdenum disulfide (MoS₂) interfacial layer at the molybdenum back contact reduces interface recombination and elevates short--circuit current density from 12.90 mA/cm² to 15.11 mA/cm², providing scalable design parameters to advance non--toxic, earth--abundant kesterite photovoltaics toward commercial viability.