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Instruments / Technical Area	Publication Details	Published	Actions
B16-Test Beamline	Bright and fast scintillations of an inorganic halide perovskite CsPbBr3 crystal at cryogenic temperatures V. B. Mykhaylyk , H. Kraus , V. Kapustianyk , H. J. Kim , P. Mercere , M. Rudko , P. Da Silva , O. Antonyak , M. Dendebera Scientific Reports 10 DOI: 10.1038/s41598-020-65672-z Diamond Proposal Number(s): [20103] Open Access Show Abstract ▼ Abstract: Highly efficient scintillation crystals with short decay times are indispensable for improving the performance of numerous detection and imaging instruments that use- X-rays, gamma-quanta, ionising particles or neutrons. Halide perovskites emerged recently as very promising materials for detection of ionising radiation that motivated further exploration of the materials. In this work, we report on excellent scintillation properties of CsPbBr3 crystals when cooled to cryogenic temperatures. The temperature dependence of luminescence spectra, decay kinetics and light yield under excitation with X-rays and α-particles was investigated. It is shown that the observed changes of spectral and kinetic characteristics of the crystal with temperature can be consistently explained by radiative decay of free excitons, bound and trapped excitons as well as electron-hole pairs originating from their disintegration. It has been found that the crystal exhibits a fast decay time constant of 1 ns at 7 K. The scintillation light yield of CsPbBr3 at 7 K is assessed to be 50,000 ± 10,000 ph/MeV at excitation with 12 keV X-rays and 109,000 ± 22,000 ph/MeV at excitation with α-particles of 241Am. This finding places CsPbBr3 in an excellent position for the development of a new generation of cryogenic, efficient scintillation detectors with nanosecond response time, marking a step-change in opportunities for scintillator-based applications.	May 2020
B16-Test Beamline	Bright and fast scintillation of organolead perovskite MAPbBr 3 at low temperatures Vitaliy B. Mykhaylyk , Hans Kraus , Michael Saliba Materials Horizons 2 DOI: 10.1039/C9MH00281B Diamond Proposal Number(s): [20103] Open Access Show Abstract ▼ Abstract: We report the excellent scintillation properties of MAPbBr3, an organic–inorganic trihalide perovskite (OTP). The characteristic scintillation time constants were determined using pulsed monochromatic 14 keV X-rays from a synchrotron. We find that between 50 and 130 K the MAPbBr3 crystal exhibits a very fast and intense scintillation response, with the fast (τf) and slow (τs) decay components reaching 0.1 and 1 ns, respectively. The light yield of MAPbBr3 is estimated to be 90000 ± 18000 ph MeV−1 at 77 K and 116000 ± 23000 ph MeV−1 at 8 K.	May 2019

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B16-Test Beamline

Bright and fast scintillations of an inorganic halide perovskite CsPbBr3 crystal at cryogenic temperatures

V. B. Mykhaylyk , H. Kraus , V. Kapustianyk , H. J. Kim , P. Mercere , M. Rudko , P. Da Silva , O. Antonyak , M. Dendebera

Scientific Reports 10

DOI: 10.1038/s41598-020-65672-z

Diamond Proposal Number(s): [20103]