Investigating the Potential of PerovskiteNanocrystal-Doped Liquid Scintillator: A FeasibilityStudy

Liquid scintillators are extensively employed as targets in neutrino experiments and in medical radiography. Perovskitenanocrystals are recognized for their tunable emission spectra and high photoluminescence quantum yields. In this study, weinvestigated the feasibility of using perovskites as an alternative to fluor, a substance that shifts the wavelengths. The liquidscintillator candidates were synthesized by doping 450, 480 and 510-nm perovskite nanocrystals into fluor PPO with varyingnanocrystal concentrations in a toluene solvent. The several properties of the perovskite nanocrystal-doped liquid scintillatorwere measured and compared with those of a secondary wavelength shifter, bis-MSB. The emission spectra of the perovskitenanocrystal-doped liquid scintillator exhibited a distinct monochromatic wavelength, indicating energy transfer from PPO to theperovskite nanocrystals. The light yield, pulse shape, and wavelength shift of the scintillation events were measured basedon the Compton scattering of a 60Co radioactive source, triggered by a coincidence of photomultiplier tube (PMT). The lightyields were evaluated from observed Compton edges from the g - ray source. A decrease (or increase) in area-normalized PMTpulse height was observed at higher perovskite nanocrystal (or PPO) concentrations. The results demonstrated the sufficientpotential of perovskite nanocrystals as an alternative to traditional wavelength shifters in liquid scintillator.