CHARACTERIZATION OF POROUS GAP BY PHOTOACOUSTIC-SPECTROSCOPY - THE RELATION BETWEEN BAND-GAP WIDENING AND VISIBLE PHOTOLUMINESCENCE

Authors
KURIYAMA K USHIYAMA K OHBORA K MIYAMOTO Y TAKEDA S
Citation
K. Kuriyama et al., CHARACTERIZATION OF POROUS GAP BY PHOTOACOUSTIC-SPECTROSCOPY - THE RELATION BETWEEN BAND-GAP WIDENING AND VISIBLE PHOTOLUMINESCENCE, Physical review. B, Condensed matter, 58(3), 1998, pp. 1103-1105
Citations number
13
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
58
Issue
3
Year of publication
1998
Pages
1103 - 1105
Database
ISI
SICI code
0163-1829(1998)58:3<1103:COPGBP>2.0.ZU;2-M
Abstract
Photoacoustic and Raman spectroscopy as well as photoluminescence (PL) measurements have been used to investigate the effect of band-gap wid ening in porous GaP. A correlation between a blueshift of the absorpti on I edge observed during photoacoustic measurements, accompanied by P L emissions in the blue and ultraviolet regions, and the occurance of a vibrational mode related to surface phonons is shown. Based on a sim ple scattering model, the structure of porous Gap is assumed to have a cylinderlike shape. [S0163-1829(98)07727-3].