Spin and recombination dynamics of excitons and carries in metal halide perovskites

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The project goal is to receive new basic knowledge on the electronic states and exciton complexes in metal halide perovskites of various chemical compositions, structures (single crystals, 3D, 2D, 0D) and in their nanocrystals (quantum dots and nanoplatelets). We plan technological, experimental and theoretical study of excitons, their energy and spin structure, recombination dynamics and coupling with light in exciton-polaritons. We will also focus on spin-dependent phenomena and spin dynamics of interacting spin systems of carriers (electrons and holes), excitons (neutral and charged) and nuclei spins, by measuring g-factors, spin relaxation and spin coherence times and identifying mechanisms of spin-spin interactions. We will search for new physical phenomena and new regimes of the known phenomena provided by the unique properties of the perovskites. The gained knowledge will be used for optimizing technology, parameters of photovoltaic and light-emitting devices and for testing the feasibility of the perovskites for spintronics applications. For experimental studies optical techniques, involving low temperatures, high magnetic fields up to 60 Tesla, polarization analysis, time-resolution in wide temporal range from 200 fs to seconds and high spectral resolution will be used. The project goals cover several focus areas of the SPP call: (i) spin effects/spin-orbit coupling; (ii) charge carrier dynamics, recombination, and transport; (iii) effects of dimensionality (single crystals, 3D, 2D, 1D, 0D) and composition tuning; and (iv) role of lead and possible alternatives.