title: High pressure evolution of YVO(4):Pr(3+) luminescence.
abstract: Photoluminescence and time-resolved photoluminescence spectra of YVO(4) doped with Pr(3+) obtained at high hydrostatic pressure up to 76 kbar applied in a diamond anvil cell are presented. At pressures lower than 60 kbar the steady state emission spectra consist of sharp lines related to the [Formula: see text] transition in Pr(3+). At pressures above 68 kbar the Pr(3+) emission intensity decreases and the corresponding bands are replaced by a broad band peaking at 19 500 cm(-1) attributed to perturbed VO(4)(3-) host luminescence. The quenching of the [Formula: see text] emission has been attributed to nonradiative transition to the charge transfer exciton trapped at Pr(3+) ion. The recovering of the VO(4)(3-) host luminescence at high pressure has been attributed to energy transfer from a Pr(3+) trapped exciton (PTE) to the host YVO(4). The kinetics of such a process is analyzed using the model of PTE considered as a Pr(4+) + electron bound by the Coulomb potential at the delocalized Rydberg states.
authors.affiliation: Institute of Experimental Physics, University of Gdańsk, Wita Stwosza 57, 80-952 Gdańsk, Poland.
authors.forename: S
authors.initials: S
authors.lastname: Mahlik
authors.forename: M
authors.initials: M
authors.lastname: Grinberg
authors.forename: E
authors.initials: E
authors.lastname: Cavalli
authors.forename: M
authors.initials: M
authors.lastname: Bettinelli
authors.forename: P
authors.initials: P
authors.lastname: Boutinaud