Cryogenic Scintillation Performance of Cs4PbI6 Perovskite Single Crystals

All-inorganic Cs4PbI6single crystals (SCs) is emergingscintillators for radiation detection. In this study, we report on the X-rayscintillation properties of Cs4PbI6SCs at the temperature range of 50-290 K. The temperature-dependent radioluminescence (RL) spectrumand decay time were investigated. It was found that the RL spectra showvery pronounced temperature-dependent changes in the overall shape.The RL intensity increases with a decrease in the temperature under X-ray excitation. The emission bands at 318, 360, and 554 nm areattributed to the near-band-edge emission in Cs4PbI6SCs, the3P1 -> 1S0transition of the Pb2+ion, and the emission of delta-CsPbI3aggregatesdispersed in the Cs4PbI6SC matrix, respectively. With decreasing temperature, the fast and slow decay times tend to slow down andare estimated to be 46.0 ns (33.22%) and 820 ns (66.78%) at 50 K, which are far superior to that of the common cryogenicscintillator. These cryogenic scintillation characteristics of Cs4PbI6SCs demonstrate its potential for cryogenic detection.

Automated summary

This study investigates the X-ray scintillation properties of all-inorganic Cs4PbI6 single crystals (SCs) in the temperature range of 50-290 K. The temperature-dependent radioluminescence (RL) spectrum and decay time are analyzed. The results show that the RL spectra exhibit significant temperature-dependent changes in shape, and the RL intensity increases as the temperature decreases under X-ray excitation. The Cs4PbI6SCs demonstrate faster decay times at lower temperatures, indicating their potential for cryogenic detection.