Ce3+-doped alkaline-earth sulfide nanocrystals for X-ray scintillation imaging screens

作者：Liu, Yuying^*; Han, Kai; Zhao, Shihao^*; Zhou, Xinquan; Gao, Song; Wang, Yexin^*; Xia, Zhiguo^*; Jiang, Shangda^*

来源：Journal of Materials Chemistry C, 2024, 12(9): 3221-3227.

DOI：10.1039/d3tc04669a

• LUMINESCENCE
• PHOSPHORS
• CE3+

Rare-earth Ce3+-doped scintillators are attracting considerable attention for X-ray detection. However, large-area and fast scintillation screens using monodispersed scintillator nanocrystals (NCs) remain a challenge in X-ray imaging. Herein, we fabricated Ce3+-doped alkaline-earth metal sulfide NCs by a high-temperature co-precipitation method. The as-prepared SrS:Ce3+ and CaS:Ce3+ NCs show a bright blue-green emission originating from the d-f transition of Ce3+, and the NCs exhibit good X-ray scintillation performance with a detection limit as low as 0.66 mu Gy(air) s(-1) and excellent anti-irradiation stability. We further successfully fabricated a homogeneous hybrid scintillation film by embedding scintillator NCs in poly(methyl methacrylate) (PMMA) and demonstrated the imaging effect of the film as an X-ray screen. This work highlights the potential of Ce3+-doped scintillator NCs for efficient X-ray detection.

• 单位
  北京大学; 中山大学