Fig. 3
From: High spectral resolution of gamma-rays at room temperature by perovskite CsPbBr3 single crystals
γ-ray response of Type I CsPbBr3 detectors to different radioactive isotopes. a Energy-resolved spectrum of 57Co γ-ray source with a characteristic energy of 122 keV using a shaping time of 2 μs. The dimension of the detector is 3 × 3 × 0.90 mm3. b Energy-resolved spectrum of 137Cs γ-ray source with the characteristic energy of 662 keV with a shaping time of 0.5 μs. The dimension of the detector is 4 × 2 × 1.24 mm3. c The mobility-lifetime fitting for electron and hole according to the Hecht equation based on the spectra indicated in Supplementary Figure 7. The error bars in CCE arising from obtaining the peak/shoulder channel number represent ±3% and ±10% errors for hole and electron, respectively. d Hole mobility μh of CsPbBr3 evaluated from the rise time distribution versus applied bias according to the equation μ = d2/(tr × V), where the d, tr, and V are the detector thickness, the rise time, and applied voltage, respectively. The drift velocity is calculated as d/tr. The distribution histogram for corresponding rise time is indicated in Supplementary Figure 12. The error bars in carrier drift velocity represent ±10% errors arising from obtaining rise time. e Highly linear detection response of CsPbBr3 planar detectors to different radiation sources and the corresponding spectra are shown in Supplementary Figure 10. f The stability of spectrum of CsPbBr3 detector over a period of 20 min under 57Co γ-source measured with a shaping time of 2 μs and applied voltage of −150 V
