one, centered at around 444 nm, which derives from the relaxation of δ* electrons to the LP state, and two low energy transitions centered at 455 and 505 nm. To access these low energy transitions a non-radiative mechanism to populate the π* state is required, thus the structure of the broadband spectrum depends on the efficiency of this process. In previous works, the interplay between the density of defects and the non-radiative population of π* state have been studied and related to the photocatalytic properties of g-C3N4. Composites with lead-free perovskite have also been investigated, with particular focus on population of non-radiative states and its impact on photocatalytic efficiency. 18