RT Journal Article
T1 Cathodoluminescence study of defects in deformed (110) and (100) surfaces of TiO_2 single crystals
A1 Fernández López, Israel
A1 Cremades Rodríguez, Ana Isabel
A1 Piqueras De Noriega, Francisco Javier
AB In this work, the effect of different surface orientations on the defect structure of TiO2 single crystals and the evolution of the luminescence properties under plastic deformation are investigated by cathodoluminescence (CL) microscopy. The main features of the spectra are an infrared band at 1.53 eV, and a complex band in the visible range, whose peak position depends on the electron beam energy, and is attributed to oxygen vacancy related defects. Comparison of the intensity of these bands in the spectra recorded at low electron beam voltage indicates that the Ti3+ defects present a higher concentration at the (110) surface, whereas the (100) surface presents a more complex defect structure related to the oxygen vacancies. Competition is observed between the visible and the infrared emission centres during plastic deformation of the samples in agreement with the different diffusion mechanisms of the defects involved in the emissions.
PB Iop Publishing Ltd
SN 0268-1242
YR 2005
FD 2005-02
LK https://hdl.handle.net/20.500.14352/50844
UL https://hdl.handle.net/20.500.14352/50844
LA eng
NO © 2005 IOP Publishing LtdThis work has been partially supported by the MCYT (ProjectMAT-2003-00455).
NO MCYT
DS Docta Complutense
RD 7 abr 2025