Highly efficient copper halide scintillators for high-performance and dynamic X-ray imaging

Abstract

Progress towards high performance X-ray detection and dynamic imaging applications, including nondestructive inspection, homeland security, and medical diagnostics, requires scintillators with high light yield, reasonable decay time, low cost, and...

Compositional engineering of doped zero-dimensional zinc halide blue emitters for efficient X-ray scintillation

“…The light yields of these Cu-doped samples were assessed by the RL spectra comparison method with a commercially available LYSO single crystal (15 × 15 × 1 mm, 33 200 photons MeV −1 ) scintillator under identical measurement conditions. The light yield can be calculated using the following equation: 18 where η is the X-ray deposited energy percentage of the scintillator, I is the RL intensity at different wavelengths ( λ ), and S is the irradiation area. The X-ray dose rate was measured using an Accu-Gold diagnostic system (Radcal) equipped with an ionization chamber.…”

“…To assess the spatial resolution of this Cs 2 ZnBr 4 :Cu scintillation detector, a standard test-pattern plate (0.05 mm Pb) is used, and the Cs 2 ZnBr 4 :Cu screen achieves a spatial resolution of 9 lp mm −1 which is higher than the commercial CsI:Tl or a-Se flat panel detector (3-3.5 lp mm −1 at MTF = 0.2). [48][49][50] To further confirm the spatial resolution, the modulation transfer function (MTF) curve was measured by the slanted-edge method, 18,21 as shown in Fig. S14.…”

“…13,14 Tang and co-workers reported different kinds of one-dimen-sional copper halide A 2 CuX 3 (A = Rb, K; X = Cl, Br) scintillators [15][16][17] and the β-Cs 3 Cu 2 Cl 5 scintillator for high-performance and dynamic X-ray imaging has also been explored. 18 Beyond the above materials, Cu + -doped Cs 2 ZnX 4 (X = Cl, Br) have attracted our attention because they combine many desirable attributes such as eco-friendliness, earth-abundance, inexpensive elemental compositions, and excellent photoluminescence (PL) performance. 19,20 Nevertheless, the composition-property relationship of doped Zn-based metal halides has not been illustrated, and their scintillation performance remains unexplored.…”

Solvent co-assembly in lead-free perovskite scintillators for stable and large-area X-ray imaging

“…3a and b. Huang–Rhys factors ( S ) were further derived to compare the electron-phonon coupling strength in both crystals by using the following equation: 14,34 where FWHM is the full width at half maximum of photon energy, ℏ ω photon is the effective photon energy, k B is the Boltzmann constant, and T is the temperature. As shown in Fig.…”

“…3a and b. Huang-Rhys factors (S) were further derived to compare the electron-phonon coupling strength in both crystals by using the following equation: 14,34…”