Methylammonium bromocuprate (MeNH3)2CuBr3 as a new self-absorption-free solution-processable X-ray scintillator

We report the radioluminescent properties of the recently discovered hybrid bromocuprate (MeNH 3 ) 2 CuBr 3 in a poly(methyl methacrylate) matrix in the form of solution- produced composite thick films. The obtained films demonstrate bright turquoise photoluminescence in UV light and intense radioluminescence due to CuKα and AgKα radiation at room temperature, exceeding the radioluminescence intensity of Cs 4 PbBr 6 @CsPbBr 3 films by more than an order of magnitude.