Mn 2+ -doped Cs 3 Cu 2 I 5 halides and their application in high resolution X-ray imaging and thermal neutron detection

Mn 2+ -doped Cs 3 Cu 2 I 5 powders prepared via solution show enhanced PL, reduced self-absorption, and achieve 16 lp mm −1 X-ray resolution. With 6 LiF, yield reaches ~24 500 photons/neutron, 3.5 × GS20, with clear n–γ discrimination for radiation detection.