Abstract
Ternary CdSe x S1−x alloy quantum dots (QDs) were synthesized using a wet chemical method. Their morphology, particle size, structural, optical, and vibrational properties were investigated using transmission electron microscopy, x-ray diffraction, UV–Vis, fluorescence and Raman spectroscopy, respectively. The optical and vibrational properties of the QDs can be controlled by adjusting the Se/S molar ratio. The absorption and emission peaks shift to a longer wavelength range when increasing the Se content. The presence of two CdSe-like and CdS-like longitudinal optical phonon modes was observed. The dependencies of the optical and phonon modes on the Se content are discussed in detail.
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Acknowledgements
The authors acknowledge the Institute of Research and Development – Duy Tan University, the Institute of Materials Science – Vietnam Academy of Science and Technology for providing facilities for PL, UV–Vis, TEM and Raman measurements presented in this article.
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Thi, L.A., Cong, N.D., Dang, N.T. et al. Optical and Phonon Characterization of Ternary CdSe x S1−x Alloy Quantum Dots. J. Electron. Mater. 45, 2621–2626 (2016). https://doi.org/10.1007/s11664-016-4444-2
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DOI: https://doi.org/10.1007/s11664-016-4444-2