Correlation of photoluminescence of (Y, Ln)VO4 : Eu3+ (Ln = Gd and La) phosphors with their crystal structures

We have studied the photoluminescence (PL) of (Y, Ln)VO4:Eu3+ (Ln = La and Gd) phosphors and the correlation of the PL of those phosphor with their crystal structure. It is found that (Y, Gd)VO4:Eu3+ phosphors have the same crystal structure as YVO4:Eu, which is tetragonal with a little different lattice parameters. In the case of (Y, La)VO4:Eu phosphors, however, the gradual change from tetragonal to monoclinic structure of host lattice was observed as the amount of La ion increased. To investigate the PL property of (Y, Ln)VO4:Eu3+ (Ln = La and Gd) phosphors, vacuum ultraviolet (VUV) and ultraviolet (UV) excitation were used. The favorable crystal structure for the PL intensity of orthovanadate phosphor under 147 and 254 nm excitation was tetragonal containing Gd ion and under 365 nm excitation was monclinic containing La ion which might have the lowest site symmetry for Eu3+ ion. (c) 2005 Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2005-03
Language
ENG
Keywords

ACTIVATED PHOSPHORS; OXIDE; ORTHOVANADATE; YB; HO; TB

Citation

SOLID STATE COMMUNICATIONS, v.133, no.10, pp.651 - 656

ISSN
0038-1098
DOI
10.1016/j.ssc.2005.01.004
URI
http://hdl.handle.net/10203/2459
Appears in Collection
MS-Journal Papers(저널논문)
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