VISIBLE EMISSION STUDY IN NANOCRYSTALLINE BA1-XPBXTIO3 AND SR1-XPBXTIO3 SYSTEMS

Authors
MENG JF RAI BK KATIYAR RS BHALLA AS
Citation
Jf. Meng et al., VISIBLE EMISSION STUDY IN NANOCRYSTALLINE BA1-XPBXTIO3 AND SR1-XPBXTIO3 SYSTEMS, Ferroelectrics. Letters section, 23(1-2), 1997, pp. 19-26
Citations number
20
Categorie Soggetti
Physics, Condensed Matter
Journal title
Ferroelectrics. Letters section → ACNP
ISSN journal
07315171
Volume
23
Issue
1-2
Year of publication
1997
Pages
19 - 26
Database
ISI
SICI code
0731-5171(1997)23:1-2<19:VESINB>2.0.ZU;2-#
Abstract
Photoluminescence spectroscopy measurements on Ba1-xPbxTiO3 and Sr1-xP bxTiO3, with grain sizes of 60 and 30 nm respectively, have been carri ed out. A single-emission band at similar to 2.0 eV for pure BaTiO3, a nd at similar to 2.14 eV in the case of pure SrTiO3,, has been observe d at room temperature. The dependence of the band-position, -intensity , and -width of the visible emission on Pb concentration using the exc itation line of 514.5, has been studied and offered a model responsibl e for the origin of photoluminescence in nanocrystalline BaTiO3 and Sr TiO3. The thermal quenching of photoluminescence for pure bulk materia ls has been discussed.