Eco-friendly and facile one-step synthesis of manganese perovskite (TMPEA)2MnBr4 for high performance X-ray imaging

Abstract

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)₂MnBr₄) with a facile one-step method at room temperature and demonstrated its impressive potential for X-ray imaging. As-synthesized (TMPEA)₂MnBr₄ 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⁻¹, and an impressive detection limit of 36.3 nGy_air s⁻¹. 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.