Our previous report demonstrated the fabrication and functionalization of the luminous dendrimer based on phenylazomethine-BiCl3 complexes (Kambe et al. in Angew Chem Int Ed 55:13151, 2016). It is now revealed that the bismuth assembled phenylazomethine dendrimers have different luminous efficiencies depending on the layers of the DPAG4 by photoemission and absorption spectroscopy.