Abstract
A series of lead-free Rb(2)ZrCl(6):xTe(4+) (x = 0%, 0.1%, 0.5%, 1.0%, 2.0%, 3.0%, 5.0%, 10.0%) perovskite materials were synthesized through a hydrothermal method in this work. The substitution of Te(4+) for Zr in Rb(2)ZrCl(6) was investigated to examine the effect of Te(4+) doping on the spectral properties of Rb(2)ZrCl(6) and its potential applications. The incorporation of Te(4+) induced yellow emission of triplet self-trapped emission (STE). Different luminescence wavelengths were regulated by Te(4+) concentration and excitation wavelength, and under a low concentration of Te(4+) doping (x ≤ 0.1%), different types of host STE emission and Te(4+) triplet state emission could be achieved through various excitation energies. These luminescent properties made it suitable for applications in information encryption. When Te(4+) was doped at high concentrations (x ≥ 1%), yellow triplet state emission of Te(4+) predominated, resulting in intense yellow emission, which stemmed from strong exciton binding energy and intense electron-phonon coupling. In addition, a Rb(2)ZrCl(6):2%Te(4+)@RTV scintillating film was fabricated and a spatial resolution of 3.7 lp/mm was achieved, demonstrating the potential applications of Rb(2)ZrCl(6):xTe(4+) in nondestructive detection and bioimaging.