High resolution X-ray imaging via near unity emission organic–inorganic manganese bromide scintillator films using a suction filtration method

Abstract

In recent years, lead-free organic–inorganic hybrid scintillators have attracted much attention in the field of X-ray imaging because of progress in their solution synthesis, low toxicity, and high photoluminescence quantum yield (PLQY). However, the methodology for the facile and versatile fabrication of high-resolution scintillators grounded in manganese-based hybrid halide systems requires further exploration. In this paper, a novel zero-dimensional (0D) manganese-based organic–inorganic hybrid perovskite material (C₂₁H₂₂P)₂MnBr₄ is studied, which was synthesized via an anti-solvent method. The corresponding materials could emit strong green light under ultraviolet light or X-ray irradiation, and a photoluminescence quantum yield (PLQY) of 98.93% could be achieved. The near unity photoluminescence quantum yield leads to its excellent scintillator performance, with a high luminous yield of 46 786 photon MeV⁻¹ and a low detection limit of 217.7 nGy_air s⁻¹. Moreover, the flexible scintillator screen was prepared by using a suction filtration process, which achieved high-resolution and low-dose radiation imaging with a line pair (lp) of 20 lp mm⁻¹. This further proved that the suction filtration approach is feasible and meaningful for preparing high-resolution scintillation screens. The (C₂₁H₂₂P)₂MnBr₄ scintillator with high resolution and high light yield has great potential application in the field of X-ray imaging.