Photoluminescence in amorphous TiO2-PbO systems

Photoluminescence (PL) at room temperature has been achieved in amorphous thin films and powders of the TiO2--PbO system. They were prepared by the polymeric precursor method with [PbO]/[TiO2] molar ratios ranging from 0.0 to 1.0. The energy position of maximum PL emission and the PL intensity showe...

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Veröffentlicht in:	Applied physics. A, Materials science & processing Materials science & processing, 2001-11, Vol.73 (5), p.567-569
Hauptverfasser:	LEITE, E. R, CARRENO, N. L. V, SANTOS, L. P. S, RANGEL, J. H, SOLEDADE, L. E. B, LONGO, E, CAMPOS, C. E. M, LANCIOTTI, F. JR, PIZANI, P. S, VARELA, J. A
Format:	Artikel
Sprache:	eng
Schlagworte:	Amorphous materials Amorphous semiconductors glasses Amorphous semiconductors glasses nanocrystalline materials Condensed matter: electronic structure, electrical, magnetic, and optical properties Emission Exact sciences and technology Lead (metal) Networks Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Optical properties of specific thin films Other solid inorganic materials Photoluminescence Physics Polymeric precursors Thin films Titanium dioxide
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Zusammenfassung:	Photoluminescence (PL) at room temperature has been achieved in amorphous thin films and powders of the TiO2--PbO system. They were prepared by the polymeric precursor method with [PbO]/[TiO2] molar ratios ranging from 0.0 to 1.0. The energy position of maximum PL emission and the PL intensity showed dependence on Pb concentration. The Pb addition suggests an increase in the number of non-bridging oxygens (NBO) in the amorphous TiO2 network. These results support the relationship between photoluminescence and structure in TiO2-based amorphous materials.
ISSN:	0947-8396 1432-0630
DOI:	10.1007/s003390100865