0_7694 Hyperbolic Metamaterials (HMMs) are metal/dielectric multilayered structures, manifesting a hyperbolic dispersion relation that gives access to large wavevector modes called “high-K modes”. In the proximity of an HMM, high-K modes mostly determine the spontaneous emission rate over all the other relaxation channels, so that exceptional Purcell factors can be reached. So far, such a peculiarity of HMMs has mostly been exploited by placing a quantum emitter on top of a multilayer device. Placing the emitter inside the HMM would be far more effective but, due to intrinsic fabrication limitations, such an option is often neglected. In this work, we overcome this limitation by fabricating an 8-bilayers HMM in which Ag is the metal and a CsPbBr₃/Cs₄PbBr₆ perovskites mixed-phase of nanocrystals represents the “active” dielectric. We then characterized the static and dynamic behavior of both the bare perovskites NCs mixture and the 8-bilayers HMM through streak-camera-based measurements. Such a rich, one-shot, and wavelength-time resolved experimental investigation, allowed us to carry out a thorough characterization of the photo-dynamics processes occurring all over the spectral emission range of the perovskite. This analysis revealed an enhancement of the spontaneous decay rate throughout the whole emission spectrum and in all the three components of the tri-exponential function used to fit the experimental PL decay curves. We report average Purcell factors equal to 4.3 for t₁, 3.14 for t₂ and 2.14 for t₃, while a Purcell factor equal to 28 was measured at the emission wavelength of the active material. We then proposed a possible explanation of the detected blue-shift of the PL peak of the perovskite compound embedded in the HMM, in terms of the spectral reshaping of the photonic density of states occurring as an effect of the high-K modes of the HMM. The results presented in this work constitute a promising step forward in HMM-based single photon sources and in all applications for which a large Purcell factor is required.