Optical Properties of II-VI Semiconductor Doped Glass

Abstract

We review structural and optical properties of CdSxSe1−x semiconductor nanoparticles embedded in an insulating glass matrix. Vibrational Raman scattering and x-ray diffraction can be used to determine the composition of the crystallites for all X and sizes. Debye-Scherrer broadening of x-ray diffraction peaks from the crystallites yields an average grain size in the semiconductor crystallites of 60Å for the series studied here. Small angle x-ray scattering reveals that the average particle diameter is close to 120Å. Optical absorption, photoluminescence, and photomodulated absorption spectra are interpreted within a spherical quantum well model. Electron-phonon coupling and size distribution effects on the spectra are also discussed.

Transient absorption study on photodarkened CdS x Se1−x doped glasses: evidence for long lived trapping states

“…The physical parameters for the two samples are listed as in Table 1. The S fraction was determined by the phonon Raman spectrum [15] and the absorption edge of the first excitonic state by extrapolating the optical absorption coefficient. The CdS x Se 1−x volume fraction was estimated to be 0.001-0.005.…”

Dinâmica de femtossegundos em pontos quânticos de CdTe

“…"rente a l'Sies últimos, o que também causa que sejam dil'fccis de ser observados. 61 -Se Lemos mais de uma transição de interesse, temos que somar cm todos os estados finais de buracos…”