Pressure-induced luminescence quenching in KY(WO 4 ) 2 :Pr 3+

S. Mahlik (1) , F. Diaz (2) , P. Boutinaud (3)

1 Institute of Experimental Physics, University of Gdansk, Gdańsk
2 Física i Cristallografia de Materials i Nanomaterials (FiCMA-FiCNA), UniversitatRovira i Virgili (URV)
3 ICCF - Institut de Chimie de Clermont-Ferrand

The quenching of the red Pr3+ (1D2 → 3H4) luminescence in a single crystal of KY(WO4)2 doped with Pr3+ is investigated at room temperature under high hydrostatic pressure. The quenching is ascribed to a pressure-induced downshift of the Pr3+ → W6+ metal-to-metal charge transfer (or impurity trapped exciton) state. The concomitant decrease of the 1D2 → 3H4 emission lifetime is reproduced using a phenomenological model. The fitting allows the determination of the pressure-induced shrinkage of the Pr3+(Y3+)-W6+ distance in the crystal. The value is consistent with the quantity previously determined in CaWO4 by means of X-ray diffraction.

Mots clés: Double tungstates; Praseodymium; High pressure; Luminescence quenching

Domaines: Chimie

S. Mahlik, F. Diaz, P. Boutinaud. Pressure-induced luminescence quenching in KY(WO 4 ) 2 :Pr 3+. Optical Materials, 2017, 74, pp.41 - 45. ⟨10.1016/j.optmat.2017.04.002⟩. ⟨hal-01660628⟩