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UV and Visible Luminescence of Pr3+ Doped Oxides: New Materials

Published online by Cambridge University Press:  01 February 2011

Fabio Piccinelli ,
Adolfo Speghini ,
Konstantin Ivanovskikh ,
Andries Meijerink ,
Cees Ronda  and
Marco Bettinelli
Fabio Piccinelli
Affiliation:
[email protected], Univ. Verona, Dept. Science and Technology, Verona, Italy
Adolfo Speghini
Affiliation:
[email protected], Univ. Verona, DiSTeMeV, San Floriano, Verona, Italy
Konstantin Ivanovskikh
Affiliation:
[email protected], Utrecht University, CMI, Debye Institute for Nanomaterials Science, Utrecht, Netherlands
Andries Meijerink
Affiliation:
[email protected], Utrecht University, CMI, Debye Institute for Nanomaterials Science, Utrecht, Netherlands
Cees Ronda
Affiliation:
[email protected], Philips Research Europe-Aachen, Aachen, Germany
Marco Bettinelli
Affiliation:
[email protected], Univ. Verona, Dept. Science and Technology, Verona, Italy
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Abstract

The garnet Ca3Sc2Si3O12 (CSSO) and the silico-carnotite Ca3Y2Si3O12 (CYSO) and Ca3Lu2Si3O12 (CLSO) materials, both undoped and doped with Pr3+, have been synthesized by solid state reaction at high temperature. The luminescence spectroscopy and the excited state dynamics of the materials have been studied upon VUV and X-ray excitation using synchrotron radiation. All doped samples have shown efficient 5d-4f emission upon direct VUV excitation of 5d levels, but only CSSO:Pr3+ shows luminescence upon interband VUV or X-ray excitation. The VUV excited emission spectra of CYSO:Pr3+ and CLSO:Pr3+ show features attributed to emission from two distinct sites accommodating the Pr3+ dopant. The decay kinetics of the Pr3+ 5d-4f emission in CSSO:Pr3+ upon VUV excitation across the conduction band are characterized by decay times in the range 25-28 ns with no significant rise after the excitation pulse. They appear to be faster upon X-ray irradiation than for VUV excitation. Weak afterglow components are attributed to defect luminescence.

Keywords

lanthanideluminescenceoxide
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1111: Symposium D – Rare-Earth Doping of Advanced Materials for Photonic Applications , 2008 , 1111-D08-07
Copyright
Copyright © Materials Research Society 2009

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