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Cryogenic Scintillation Performance of Cs4PbI6 Perovskite Single Crystals
Yang Li1, Liang Chen2, Xiaoping Ouyang2
1The Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
Inorganic Chemistry
|May 3, 2022
Summary
All-inorganic cesium lead iodide (Cs4PbI6) single crystals show promising X-ray scintillation properties at cryogenic temperatures. Their enhanced light output and slower decay times at low temperatures suggest potential for advanced radiation detection applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nuclear Instrumentation
Background:
- All-inorganic Cs4PbI6 single crystals are emerging as novel scintillators for radiation detection.
- Understanding their scintillation properties, especially at cryogenic temperatures, is crucial for advanced applications.
Purpose of the Study:
- To investigate the X-ray scintillation properties of Cs4PbI6 single crystals (SCs) between 50 K and 290 K.
- To analyze the temperature-dependent radioluminescence (RL) spectra and decay times.
- To evaluate the potential of Cs4PbI6 SCs for cryogenic detection.
Main Methods:
- Temperature-dependent X-ray excitation.
- Measurement of radioluminescence (RL) spectra.
- Analysis of RL decay times at various temperatures.
Main Results:
- Pronounced temperature-dependent changes in RL spectra were observed.
- RL intensity increased significantly with decreasing temperature.
- Emission bands were identified at 318 nm, 360 nm, and 554 nm.
- Fast and slow decay times at 50 K were measured as 46.0 ns and 820 ns, respectively.
- Decay times slowed down considerably with decreasing temperature.
Conclusions:
- Cs4PbI6 SCs exhibit significant temperature-dependent scintillation behavior.
- Their superior cryogenic scintillation characteristics, including enhanced intensity and slower decay times, highlight their potential for cryogenic radiation detection.
- The identified emission mechanisms provide insights into the scintillation process in Cs4PbI6 SCs.
