Vážené kolegyne a vážení kolegovia,
dovoľujeme si Vás pozvať na prednášku Dr. Viktora ŠKORJANCA z Helmholtz-Zentrum Berlin (HZB), Germany, na tému „Interface Engineering of Co-Evaporated Metal Halide Perovskite Films for Efficient Perovskite-Silicon Tandem Solar Cells„
Development of up-scalable deposition methods is essential for large-scale deployment of metal halide perovskite solar cells. Co-evaporation is a single-step deposition technique that is particularly relevant for fully-textured perovskite-silicon tandem solar cells, as it allows for conformal coverage of micron-sized pyramid texture. However, the growth of co-evaporated metal halide perovskites is particularly sensitive to the properties of the substrate surface. In this talk, I will show a systematic study of the influence of inorganic seed layers on metal halide perovskite growth. CsCl is selected as the optimal seed layer for the studied system, producing films with ~1.68 eV band gap for perovskite-silicon tandem solar cells and a single-junction solar cell with 19.6% efficiency with improved stability. Nano-scale analysis using infrared scattering-type scanning near-field optical microscopy and X-ray photoemission electron microscopy reveals that CsCl mitigates inhomogeneities in the carbazole-based hole-extraction layer, preventing the formation of interfacial PbI2. Applied to perovskite-silicon tandem solar cells, CsCl improved fill factor and open-circuit voltage, yielding a certified tandem efficiency of 29.7%.