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- W2405706245 abstract "Quantum dots (QDs) show a growing number of their applications in lasers, electronics, photovoltaics, photocatalysis, and thermoelectric and biomedical fields. However, the band structure of QDs is complex, which requires accurate techniques to study QDs energy levels precisely. Сyclic voltammetry of QDs gives information about the absolute energies of the valence and conduction bands (from the oxidation and reduction potential values). In this study, we report the structure and temperature dependence of the bandgap of CdTe/CdS core–shell QDs stabilized by thioglycolic acid of different diameters determined electrochemically and compare these results with optical measurements. The cyclic voltammograms were obtained by scanning the potentials from −2 to 2 V at scan rates of 0.1, 0.2, 0.5, 1, and 2 V/s. Measurements were carried out in the range starting from room temperature up to 55 °C. The temperature-dependent CV study demonstrates that the temperature coefficient decreases with increasing size of the QDs. The temperature dependence of the electrochemical and optical energy gaps agrees well with the Varshni equation. Difference of the diffusion-limited electron transfer for reduction and oxidation processes was observed." @default.
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- W2405706245 date "2015-01-01" @default.
- W2405706245 modified "2023-09-27" @default.
- W2405706245 title "Temperature Dependence of the Bandgap of CdTe/CdS Core–Shell Quantum Dots" @default.
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- W2405706245 doi "https://doi.org/10.1007/978-3-319-18543-9_17" @default.
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