Hydrothermal synthesis and photoluminescence properties of Cu-doped ZnSe quantum dots using glutathione as stabilizer
In the present work, the direct preparation of Cu-doped ZnSe quantum dots (ZnSe:Cu QDs) via hydrothermal route using L-glutathione (GSH) as a stabilizer was investigated by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), UV-vis absorption, and photoluminescence (PL) emission spectroscopies. Structural investigations indicated that the GSH capping ZnSe:Cu QDs were about 3 nm in size, showing size-dependent optical properties of the prepared QDs. The as-synthesized ZnSe:Cu QDs were observed to emit green fluorescence at 468 nm when excited at 321 nm. The effect of the several experimental factors was surveyed and the optimum conditions was found to be: hydrothermal time, 60 min; pH of reaction solution, 10.5; molar ratio of GSH-to-Zn, 1.2; Cu2+ doping amount, 5%.
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Document Type: Research Article
Publication date: April 1, 2018
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