New crystal-modifying agent called piracetam could enable scalable and efficient all-perovskite tandem solar cells
Researchers from Wuhan University, South China Normal University and Chinese Academy of Sciences (CAS) have explained that while all-perovskite tandem solar cells (TSCs) offer exceptional performance and versatile applicability, a significant challenge persists in bridging the power conversion efficiency (PCE) gap between small- and large-area (>1 cm2) devices, which presents a barrier to the commercialization of all-perovskite TSCs.
Now, the team introduced a specialized crystal-modifying agent, piracetam, tailored for wide-bandgap perovskites, homogenizing top wide-bandgap subcells and enabling the construction of efficient large-area TSCs.