Growth and luminescence characteristics of Pr~(3+)-doped Lu_(0.8)Sc_(0.2)BO_3 http://Luo.sSco.2BO3 single crystal

摘要

Transparent Pr~(3+)-doped Lu_(0.8)Sc_(0.2)BO_3 crystal has been grown by Czochralski method. The crystal structure is confirmed to be hexagonal with space group R3c checked by XRD measurement. The optical transmission spectra (absorption spectra), photoluminescence emission and excitation spectra, fluorescence decay time and the X-ray excited luminescence spectra of the crystal are measured at room temperature. The cut-off edge of this material locates at round 250 nm and there is a broad absorption in the region from 250-500 nm. The photoluminescence emission spectrum is dominated by fast 5d4f~1 -> 4f~2 band peaking at 303 nm having 11.9 ns decay time.