Spectroscopic studies of SnO2 doped with Cr, Co or Nb

Artigo

Fecha

2003-03-15

Registro en:

Materials Science Forum, v. 416-418, n. 1, p. 651-656, 2003.

0255-5476

http://hdl.handle.net/11449/67235

10.4028/www.scientific.net/MSF.416-418.651

WOS:000182605200107

2-s2.0-0037282880

4284809342546287

http://repositorioslatinoamericanos.uchile.cl/handle/2250/3916914

Autor

Universidade Estadual Paulista (Unesp)

Universidade de São Paulo (USP)

Universidade Federal de São Carlos (UFSCar)

University of Belgrade

Faculty of Technology and Metallurgy

Institución

Universidade Paulista Júlio de Mesquita Filho (Brasil)

Resumen

SnO2 ceramics doped with different amounts of Co, Cr or Nb were investigated using visible and infrared spectroscopy at room temperature. Based on the observed d-d transitions the valence states of incorporated dopants were determined. Values of the optical band-gap were calculated in all samples. The infrared spectra of the samples displayed variations in the position, relative intensity and width of the bands, which were attributed to the presence of dopants.