Sean Bourelle

Jul 26, 2024 | link.aps.org | Sean Bourelle |Xie Zhang |Sascha Feldmann

Popular Summary Hybrid halide perovskites show impressive performance for optoelectronic applications, which raises key questions on the direct/indirect nature of the bandgap, their unexpected defect tolerance, and physical mechanism of bright luminescence. Combining theory and experiment, the authors show that the nature of the bandgap of hybrid halide perovskites spatially varies from a more direct surface region to a slightly indirect bulk.