Fig. 4: Scintillation performances of 3D/0D heterostructure scintillators.
a RL spectra evolution of 3D/0D(3% Sb) heterostructure scintillators with different fractions. Inset is photographs of X-ray excited scintillators. Scale bar: 3 cm. b RL spectra of 0D and 3D0.1/0D0.9 heterostructure scintillators. The RL spectra of heterostructure is fitted with the blue emission of 3D phase and the green emission of 0D phase. The RL intensity of 3D/0D scintillator is determined based on the normalized 0D scintillator. c Relative RL intensities of 0D and 3D/0D heterostructure scintillators compared with BGO. The RL emissions of heterostructure scintillators include self-0D emission, CT-induced 0D emission and 3D emission. The self-0D emission is calculated by multiplying the emission of pure 0D emission by their weight fraction because there is a linear relationship between RL intensity and weight within a certain range. Then, the CT-induced 0D emission (white numbers in (c)) is calculated by subtracting the self-0D emission from the fitted 0D emission. d Photograph of a large-area heterostructure scintillator screen. e Photographs of a standard line-pair card and the X-ray imaging of heterostructure scintillator. Scale bars: 1 mm. f Gray profiles of three line-pairs. g MTF curve, inset is the corresponding X-ray edge image. Scale bar: 1 mm. h X-ray irradiation stabilities of 3D/0D scintillators with and without encapsulation and commercial CsI(Tl) single crystal scintillator. Inset is the RL intensity evolution of 3D/0D scintillators during the initial dose accumulation up to 150 Gy. i RL intensity of 3D/0D scintillator as a function of temperature.
