Near-infrared luminescence spectroscopy of Al2O3 : V3+ and YP3O9: V3+

✍ Scribed by Christian Reber; Hans U. Güdel

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 626 KB
• Volume: 154
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(89)87125-8

✦ Synopsis

Near-infrared luminescence and excitation spectra of A1203 : V3+ and YP,Os : V'+ are presented. In Al,OJ : V"+ the trigonal and spin-orbit splitting of the 'T,, (0, notation) ground state is determined: spinor levels {with D, symmetry designations) are at 0 (A, ), 8.1 (E), 992 (E) and 1134 cm-' (E, A, and Ai overlapping).

Errors in the literature concerning these splittings are corrected. A full crystal field calculation is used to rationalize all the information from absorption and luminescence spectra.

There is spectroscopic evidence for inequivalent V )+ sites in YP,09 : V'+. The quantum efficiency in both systems is low, in contrast to V3+ doped in chloride and bromide host lattices. A simple model is presented to account for this difference.