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Structure and optical properties under VUV excitation of Mn 2+ doped Alkaline Earth Aluminate Phosphors
Author(s) -
Nötzold D.,
Wulff H.,
Jilg S.,
Kantz L.,
Schwarz L.
Publication year - 2006
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200521372
Subject(s) - phosphor , alkaline earth metal , aluminate , crystal structure , rietveld refinement , excited state , ion , analytical chemistry (journal) , doping , crystallite , chemistry , manganese , materials science , band gap , crystallography , alkali metal , atomic physics , physics , optoelectronics , organic chemistry , chromatography , cement , metallurgy
Polycrystalline hexagonal alkaline earth aluminates M 3 Al 16 O 27 with M 3 :BaMg 2 , Ba 1.5 Mg 1.5 , and Sr 1.5 Mg 1.5 doped by divalent manganese and prepared by solid state reaction were investigated concerning their crystal structure and optical properties at room temperature. Rietveld procedures were used for structure parameters refinement. The investigated aluminate phosphors crystallize in the space group P6 3 /mmc. Mn 2+ ions occupy both tetrahedral 4f lattice positions of the small cations in the unit cell. Transitions between the terms 4 T 1 ( 4 G) and 6 A 1 ( 6 S) within the 3d 5 configuration of the Mn 2+ ion cause the green emission of the phosphors. It can be excited very efficient by VUV radiation. Spectral position of the emission band which seems to consist of two superimposed bands and its band width at half height as well as the shape of the excitation spectrum are almost independent of the composition of M 3 in M 3 Al 16 O 27 . The luminous flux of the investigated aluminate phosphors depends on their composition. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)