Functional characterization of lead-free hybrid perovskite materials and solar cells

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Project aim is to elucidate of quantitative structure-function relationships that exist in novel tin perovskite photoactive layers, which can then be used to form a design criteria to fabricate absorbers for high efficiency solar cells. He will use a range of advanced optical and structural characterization techniques to probe interfacial charge transfer processes as a function of materials and interface morphology. Specifically, optical probes such as laser-based transient absorption, time-correlated single photon counting and femtosecond upconversion spectroscopy will be used to directly interrogate (in real time) the kinetics of charge separation and recombination. These studies will be complemented by electron microscopy and XPS to probe film morphology and the nature of defects within the films. He hopes to principally develop skills in solution-based fabrication as well hands-on experience in using optical and structural probes discussed herein.