Analysis of the Urbach tail in cesium lead halide perovskites

The role of structural and dynamical disorder in semiconductors is a topic fundamental relevance because its contribution to the spectral line shape photoluminescence, it plays major ruling carrier transport properties at band edge. In this regard, class semiconductors, i.e., halide perovskites, deeply investigated last decade, shows peculiar degree disorder, which has only been recently under investigation. interest study perovskites related large set innovative applications materials, spanning from energy harvesting high brilliance incoherent coherent light emitters. perspective, we show that quantitative information on can be extracted by deep analysis photoluminescence different experimental conditions. Our study, conducted samples metal perovskite, CsPbBr 3, prepared with various synthesis/deposition methods, clarifies relative weight static dynamic contributions. A comparison theoretical predictions provided, gaining insights into exciton/carrier–phonon interaction perovskites.