Luminescence Properties of Rb₂ZnCl₄ and K₂ZnCl₄ Single Crystals

Abstract

Abstract First data the on X‐ray‐induced luminescence (RL) and thermoluminescence (TL) spectra in the range 10 to 300 K of K 2 ZnCl 4 and Rb 2 ZnCl 4 are reported. For both the materials, two main emission bands peaking at 280 and 545 nm are observed in the RL spectra. They are proposed to be associated to intrinsic electron–hole recombination processes. The TL spectra show the most intense glow peaks near 205 K for both, K 2 ZnCl 4 and Rb 2 ZnCl 4 . The wavelength spectrum of the TL peaks essentially consists of the same bands appearing in the RL spectrum measured at the same temperature. Therefore, the glow peaks should also have their origin in the same electron–hole recombinations.