Indirect and time-lapse X-ray detection with Ba2LuNbO6:Bi3+ double perovskite phosphors

Abstract

X-Ray detection has attracted attention in the fields of environmental monitoring, security inspection, and biological health. However, there is still an urgent need for accurate X-ray detection with increased spatial resolution since the available scintillation-based materials respond to both X-rays and ultraviolet (UV) photons, which makes interference inevitable. Herein, novel Ba₂LuNbO₆:Bi³⁺ phosphors with a double perovskite structure were developed as an effective scintillator with an intense luminescence located at 425 and 485 nm, which is attributed to distinct cation sites occupied by Bi³⁺ ions. Moreover, a superior X-ray dose rate-dependent performance and high stability under X-ray irradiation are achieved for indirect X-ray detection. Notably, the trapping procedure of the carriers is achieved with X-rays rather than UV light, which suggests that time-lapse X-ray detection that rules out UV interference could be realized with a profoundly improved spatial resolution. Herein, this work not only provides insight into fascinating X-ray storage materials but also offers opportunities for the development of X-ray detection with high spatial resolution.