Researchers have discovered that controlling environmental humidity significantly improves the efficiency of perovskite solar cells. Using conductive atomic force microscopy (C-AFM) and friction force microscopy (FFM), they found that perovskite thin films fabricated in a humidity-free environment show better crystallinity and fewer trap sites than those made in high humidity. Local decrystallization was observed in high-humidity environments, which decreased the efficiency. By preventing this decrystallization, the power conversion efficiency increased by about 122%, primarily due to the increased current density from the elimination of decrystallized areas. This study suggests that mapping local current and friction using C-AFM and FFM can be effective techniques for improving the crystal engineering of perovskite solar cells.-Journal cover design by scapiens
[Scientific Journal cover design] Low-Thermal-Budget Fluorite-Structure Ferroelectrics for Future Electronic Device Applications
In article number 2100028, Jiyoung Kim, Si Joon Kim, and their team review key factors involved in developing fluorite-structure ferroelectrics
