Eco-friendly and facile one-step synthesis of manganese perovskite (TMPEA)MnBr for high performance X-ray imaging.

Inorganic-organic metal halogen perovskites, especially eco-friendly perovskites, have been intensively developed for X-ray imaging due to the high sensitivity, the low detection limit, and the high light yield. In this work, we successfully synthesized eco-friendly perovskite trimethylphenylammonium manganese(ii) bromide ((TMPEA)MnBr) with a facile one-step method at room temperature and demonstrated its impressive potential for X-ray imaging. As-synthesized (TMPEA)MnBr films have exhibited a high photoluminescence quantum yield (PLQY) of 83.18% at a peak wavelength of 521 nm with a huge Stokes Shift of 0.237 eV. The 70 μm perovskite film possesses a high light yield of 27 000 photons per MeV, spatial resolution of 10.2 lp mm, and an impressive detection limit of 36.3 nGy s. This work demonstrates the great potential of eco-friendly Mn-based perovskites and the novel easy fabrication method, which inspires further exploration in the field.