This paper reports highly efficient and eco-friendly X-ray scintillators based on an organic metal halide, ethylenebis-triphenylphosphonium manganese (II) bromide ((C38H34P2)MnBr4). These scintillators, prepared via a facile room-temperature solution growth method, exhibit green emission (517 nm peak), a 95% photoluminescence quantum efficiency, a high light yield (~80,000 photon MeV⁻¹), and a low detection limit (72.8 nGy s⁻¹). X-ray imaging tests demonstrate their effectiveness in high-resolution radiography, and flexible scintillators are fabricated by blending (C38H34P2)MnBr4 powders with polydimethylsiloxane.

Liang-Jin Xu, Xinsong Lin, Qingquan He, Michael Worku, Biwu Ma