Comparative analysis of Raman spectra of PbS macro- and nanocrystals
- 527 Downloads
A comparative analysis of the Raman spectra of bulk PbS and PbS nanocrystals with average diameters of 6.6 and 3.8 nm has been performed. It is shown that the bands due to the LO phonons at the Γ point of the Brillouin zone dominate in the first- and second-order Raman spectra of the nanocrystals. Based on the analysis of the relative band intensities for the first- and second-order spectra a qualitative conclusion is drawn: the electron-LO-phonon interaction in PbS nanocrystals increases with a decrease in their size.
KeywordsRaman Spectrum PbTe PbSe Phonon Dispersion Curve Phonon Band
- 1.A. V. Fedorov and A. V. Baranov, Optics of Nanostructures, Ed. by A. V. Fedorov (Nedra, St. Petersburg, 2005), p. 181 [in Russian].Google Scholar
- 2.Semiconductors: Group IV Elements, IV–IV and III–IV Compounds, Landolt-Börnstein, New Series, Group III, Ed. by O. Madelung, U. Rössler, and M. Schulz (Springer, Berlin, 2005), Vol. 41, Pt. A.Google Scholar
- 13.Landolt-Börnstein, Numerical Data and Functional Relationships in Science and Technology, Ed. by O. Madelung and G. Nimtz (Springer, Berlin, 1983), Vol. 17f.Google Scholar