A highly efficient Na-doped Cs 3 Cu 2 I 5 scintillator for γ-ray detection and flexible X-ray imaging

Na + doping in Cs 3 Cu 2 I 5 elevates the PLQY to 95%. Cs 3 Cu 2 I 5 :Na + γ-ray detector has good energy resolution and high light yield. A breakthrough spatial resolution of 25.6 LP per mm@MTF = 0.2 was achieved for X-ray imaging based on Cs 3 Cu 2 I 5 :Na + @PMMA film.