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Description
$CsPbBr_3$ is a robust fully-inorganic semiconductor of the lead-halide family of perovskites (LHPs), whose outstanding properties and low cost promise several applications in photovoltaics, photodetectors, and optoelectronics. However, their band structure, which is fundamental to describe their interaction with light, remains poorly studied. By applying angle-resolved photoemission spectroscopy utilizing an extreme-UV light source, a direct view of the electronic structure in the whole surface Brillouin zone was achieved. Valence band mapping of $CsPbBr_3$ single crystals was performed, in agreement with available theoretical studies. The effective masses of the holes were calculated from extracted band dispersions along different high symmetry directions.
