Artigo de Periódico
Optical band-gap determination of nanostructured WO3 film
Fecha
2010Registro en:
0003-6951
v. 96, n. 6
Autor
González-Borrero, P. P.
Sato, F.
Medina, A. N.
Baesso, Mauro Luciano
Bento, Antonio Carlos
Baldissera, G.
Persson, C.
Niklasson, G. A.
Granqvist, C. G.
Silva, A. Ferreira da
González-Borrero, P. P.
Sato, F.
Medina, A. N.
Baesso, Mauro Luciano
Bento, Antonio Carlos
Baldissera, G.
Persson, C.
Niklasson, G. A.
Granqvist, C. G.
Silva, A. Ferreira da
Institución
Resumen
The optical band-gap energy of a nanostructured tungsten trioxide film is determined using the
photoacoustic spectroscopy method under continuous light excitation. The mechanism of the
photoacoustic signal generation is discussed. The band-gap energy is also computed by other
methods. The absorption coefficient as well as the band-gap energy of three different crystal
structures of tungsten trioxide is calculated by a first-principles Green’s function approach using the
projector augmented wave method. The theoretical study indicates that the cubic crystal structure
shows good agreement with the experimental data.