Abstract
We present a study of growth of a novel system of CdTe nanoparticles embedded in sodium/lithium-mixed phosphate glass matrix in a strong quantum confinement regime. The prepared systems are characterized by differential thermal analysis, X-ray diffraction, TEM, optical absorption, infrared and Raman Spectroscopy. We have investigated the effect of glass matrix composition and annealing time on the growing of the CdTe semiconductor nanoparticles. We found that the decrease in Na2O content and addition of ZnO to the glass composition is strongly affecting the nanoparticles formation and capping surface of the nanoparticls. On the other hand, we have calculated the size of nanoparticles by effective mass approximation (EMA) and empirical method based on tight binding approximation and found that the calculation based on tight binding approximation are very plausible than that one calculated by EMA.
Highlights
Semiconductor nanoparticles have received considerable attention in the field of material science research due to their unique optical and electronic properties
The prepared samples characterized by differential thermal analysis, X-ray diffraction, transmission electron microscopy (TEM), optical absorption spectroscopy, Infrared spectroscopy and Raman Spectroscopy
We have presented a preparation of a novel system of CdTe embedded in phosphate glass matrix
Summary
Semiconductor nanoparticles have received considerable attention in the field of material science research due to their unique optical and electronic properties. The colour of absorption and emission can be tuned just by changing the size of the nanocrystals, without any changes in composition or stoichiometry These properties make nanoparticles a very attractive material for many applications. The unique in optical properties of the nanoparticles comes from the quantum confinement effects which arise when the size of the semiconductor have dimensions of 10 nanometers or less [1,2,3] In this framework a number of researches have been dedicated to the fabrication of small semiconductor nanocrystals in different type of dielectric matrices either solids or liquids [4,5,6,7,8]. The prepared samples characterized by differential thermal analysis, X-ray diffraction, TEM, optical absorption spectroscopy, Infrared spectroscopy and Raman Spectroscopy
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