The normalized photoluminescence spectra of the Cs2AgBiCl6/g-C3N4 systems are reported in Figure . The emission is dominated by the broad and intense features of graphitic carbon nitride, even at very high perovskite loading. Such broad spectra, that completely covers the weak perovskite emission, derive from the superimposition of multiple electronic transitions. In particular, three transitions have been modeled in pristine g-C3N4: a high energy