Growth and Spectroscopic Properties of Pr3+ Doped Lu2S3 SingleCrystals
Abstract
For the first time Lu2S3 (undoped and Pr-doped) single crystals were successfully grown from melt using micro-pulling-down (mPD) technique. Customization of halide mPD apparatus allowed us to grow rod-shaped ( 2 mm and length around 20 mm) crystals of Lu2S3 with high melting temperature (~1750 ). X-ray powder diffraction revealed that the grown crystals exhibit the ε-Lu2S3 crystal structure (α-Al2O3 type, space group R-3c). Optical and scintillation properties of both the undoped and Pr3+ doped Lu2S3 were investigated. Fast 5d-4f Pr3+ luminescence was observed in both photoluminescence and radioluminescence spectra. The presented technology is an effective tool for the exploration of a large family of high-melting sulfides. Such materials show promise for application as scintillators, active laser media, and optoelectronic components.
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