Growth and spectroscopic characteristics of Cr3+:KSc(WO4)2 Crystal

Abstract The Cr3+:KSc(WO4)2 crystal was grown by top seed solution method. The absorption and luminescence spectra were investigated. The absorption cross section σa is 1.16 × 10−19 cm−2 at 469 nm for the 4A2 → 4T1 transition and 4.98 × 10−20 cm−2 at 684 nm for the 4A2 → 4T2 transition, respectively. The emission cross section σe of 4T2 → 4A2 transition is 4.86 × 10−20 cm2 at 916 nm with FWHM of 200 nm and fluorescence lifetime is 19.83 μs. Based on the absorption and emission spectra, the crystal field strength Dq, the Racah parameters B and C, the effective phonon energy ħω and the Huang-Rhys factor S were calculated. Cr3+ ions in KSc(WO4)2 crystal occupy the weak crystal field sites and have stronger coupling to crystal lattice.