Optical spectroscopy and excited state dynamics of CaMoO{sub 4}:Pr{sup 3+}

Journal Article · Sun Jan 15 04:00:00 EST 2012 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.11.004· OSTI ID:21612862

Cavalli, Enrico ^[1]; Angiuli, Fabio ^[1]; Boutinaud, Philippe ^[2]; Mahiou, Rachid ^[3]

---

1. Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Universita di Parma, Parma (Italy)
2. Clermont Universite, ENSCCF, Laboratoire des Materiaux Inorganiques, BP10448, F-63000 Clermont-Ferrand (France)
3. CNRS, UMR6002, F-63177 Clermont-Ferrand (France)

The luminescence properties of CaMoO{sub 4}:Pr{sup 3+} have been investigated in different experimental conditions in order to obtain information on the excitation and de-excitation pathways of this system. The structure of the emission spectrum depends on different factors: excitation conditions, doping level, temperature, etc. In addition, measurements carried out on single crystals and on micro- or nano-crystalline powders obtained by solid state reaction and sol-gel method have revealed that the morphology of the sample, and then the concentration of the lattice defects, strongly influences the excitation mechanism. These effects have been analysed in the light of available models and a general scheme accounting for the experimental observations has been proposed. - Graphical abstract: A general scheme is proposed in order to account for the complex dependence of the luminescence properties of the CaMoO{sub 4}:Pr{sup 3+} system on the experimental parameters including excitation wavelength, temperature, doping concentration, etc. Black-Small-Square Highlights: Black-Right-Pointing-Pointer Emission spectra of CaMoO{sub 4}:Pr{sup 3+} have been measured in different conditions. Black-Right-Pointing-Pointer Effects of the interaction between host and Pr{sup 3+} ions have been explored. Black-Right-Pointing-Pointer A 'host+active ion' scheme allows to account for the experimental observations.

• OSTI ID: 21612862
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 185; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALKALINE EARTH METALS
CALCIUM
CHARGED PARTICLES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DE-EXCITATION
ELEMENTS
EMISSION
EMISSION SPECTRA
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
INTERACTIONS
IONS
LUMINESCENCE
METALS
MOLYBDATES
MOLYBDENUM COMPOUNDS
MONOCRYSTALS
MORPHOLOGY
NANOSTRUCTURES
OXYGEN COMPOUNDS
PHOTON EMISSION
PRASEODYMIUM
PRASEODYMIUM IONS
RARE EARTHS
REFRACTORY METAL COMPOUNDS
SOL-GEL PROCESS
SOLIDS
SPECTRA
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS