Bright Green-Emitting All-Inorganic Terbium Halide Double Perovskite Nanocrystals for Low-Dose X-ray Imaging

• DOI: 10.1021/acs.jpclett.3c02070
• Publication Date: 2023-09-19T17:08:06Z
• Authors: Wei Zhou; Cheng Li; Tong Wu; Runze Liu; Zhiling Ding; Ruiling Zhang; Yang Yu; Peigeng Han; Ruifeng Lu
• Keywords: Terbium

Inorganic halide double perovskite (DP) nanocrystals (NCs) have attracted great attention because of their nontoxicity, mild reaction conditions, good stability, and excellent optical optoelectronic properties. Herein, we prepare the inorganic terbium DP Cs2BTbCl6 (B = Na or Ag) NCs with bright green photoluminescence (PL) emission. The Na–Tb-based exhibit better PL properties compared Ag–Tb-based NCs, which is due to Cs2NaTbCl6 having a more localized charge carrier distribution on [TbCl6]3– octahedron. incorporation Sb3+ dopant in can construct efficient energy transfer process, resulting doubling efficiency. Furthermore, Cs2NaTbCl6: possess X-ray scintillating performance low-dose detection limit 140 nGyair/s, nearly 5 times sensitive than undoped NCs. optimized show application prospects imaging. This work helps deepen understanding luminescence mechanism, excited state dynamics, scintillation property Tb-based