Luminescence of Eu sup 2+ in strontium and barium thiogallates

Journal Article · Fri Dec 01 00:00:00 EST 1989 · Journal of Solid State Chemistry; (USA)

DOI:https://doi.org/10.1016/0022-4596(89)90181-3· OSTI ID:6731823

Davolos, M R; Garcia, A; Fouassier, C; Hagenmuller, P ^[1]

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1. Universite de Bordeaux, Talence (France)

Solid state investigation of the MS-Ga{sub 2}S{sub 3} systems (M = Sr, Ba) gives evidence of the existence of the following thiogallates: SrGa{sub 2}S{sub 4}, Sr{sub 2}Ga{sub 2}S{sub 5}, BaGa{sub 4}S{sub 4}, Ba{sub 2}Ga{sub 2}S{sub 6}, Ba{sub 4}Ga{sub 2}S{sub 7}, and Ba{sub 5}(GaS{sub 4}){sub 2}. When substituted for the alkaline earth, Eu{sup 2+} shows an emission in most host lattices. The emission band shifts to longer wavelengths with increasing M/Ga atomic ratio of the host lattice. For most thiogallates, despite low phonon energies and small Stokes shifts, quenching of the Eu{sup 2+} emission starts below 300 K. Reasons for such behaviors are discussed.

• OSTI ID: 6731823
• Journal Information: Journal of Solid State Chemistry; (USA), Vol. 83:2; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
EUROPIUM IONS
LUMINESCENCE
BARIUM
DATA ANALYSIS
EXPERIMENTAL DATA
MEASURING INSTRUMENTS
MEASURING METHODS
STRONTIUM
SULFUR COMPOUNDS
ALKALINE EARTH METALS
CHARGED PARTICLES
DATA
ELEMENTS
INFORMATION
IONS
METALS
NUMERICAL DATA
400102* - Chemical & Spectral Procedures