A semiempirical tight-binding GW-BSE model reproduces thickness-dependent exciton energies and binding energies in layered lead-iodide perovskites, showing a 2D-to-3D crossover.
The 2s exciton state, having a smaller binding energy, exhibits a larger increase by 90 meV
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Thickness-dependent optical properties of layered hybrid organic-inorganic halide perovskites: A tight-binding GW-BSE study
A semiempirical tight-binding GW-BSE model reproduces thickness-dependent exciton energies and binding energies in layered lead-iodide perovskites, showing a 2D-to-3D crossover.