Abstract
CdS nanocrystals with narrow size distribution were synthesized in an organic solution and transparent CdS nanocrystals/polystyrene composite films were fabricated. Transmission electron microscopy, energy dispersive X-ray spectroscopy, photoluminescence and Raman spectra were adopted to investigate these samples. The result of photoluminescence measurement shows that the composite films exhibit distinct luminescence properties of more stable emission and a narrower full-width at half-maximum than that of CdS nanocrystals in solution. Detailed analysis of the Raman spectra has enabled us to identify the origin of the optimized optoelectronic properties of the CdS nanocrystals-polystyrene composites films.
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