Low-wave-number Raman scattering from CdSxSe1-x quantum dots embedded in a glass matrix (CROSBI ID 100694)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Ivanda, Mile ; Babocsi, K. ; Dem, C. ; Schmitt, M. ; Montagna, M. ; Kiefer, W.
engleski
Low-wave-number Raman scattering from CdSxSe1-x quantum dots embedded in a glass matrix
The Raman scattering on acoustical phonons from CdSxSe1-x quantum dots in a glass matrix were investigated for in- and off-resonance conditions. By a comparison with a model calculation, the off-resonance scattering showed that the homogeneous broadening mainly contributes to the spectral width of the acoustical vibrational modes. The contribution of inhomogeneous broadening is 30% of the symmetric mode linewidth. For photodarkened samples measured under resonance conditions we showed by comparing the experimental results with the calculations that the ground levels for resonant particle excitation are the trap states filled with the carriers by a photodarkening process. The determined trap energies are in the range of 1-1.5 eV.
semiconductor-doped glasses; nanocrystals; photoluminescence; microcrystals; coefficient; electrons
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Podaci o izdanju
67 (23)
2003.
235329-235338-x
objavljeno
1098-0121