Crystal growth and luminescence characterization of LaCl<inf>3</inf>:Dy³⁺ single crystal for the laser application

Abstract

This paper reports the LaCl3:Dy3+ single crystal that was successfully grown by an in-house-developed Bridgman furnace. Powder X-ray diffraction (XRD) data were investigated for structural characterization of LaCl3:Dy3+ single crystal. The emission spectrum of the grown crystal was recorded under UV excitation, which reveals intense emissions in the blue (478 nm) and yellow (571 nm) regions, corresponding to the characteristic Dy3+ transitions. The CIE coordinates and CCT values were used to determine the color of the emitted light, obtained from the emission spectra. Judd-Ofelt theory was also applied to calculate the JO parameters (Ω2, Ω4, and Ω6) and radiative properties such as radiative transition probabilities (AR), stimulated emission cross-sections (σ(λp)), and branching ratios (βR). The results illustrate the capability of the LaCl3:Dy3+ crystal, a promising candidate for a 571 nm laser source.