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- W1992318621 abstract "We report the temperature dependence of the optical absorption and emission spectra of quantum dots (QDs) for three different nanocrystal (NC) structures (CdSe core, CdSe/CdS core/shell, and CdSe/CdS/ZnS core/multishell) in the solid film state. For this, a transparent single-walled carbon nanotube (SWCNT) film attached to a QD thin layer was tested as a heater. The temperature dependence of spectral shifts in both absorption and emission of QDs was measured in the range 300–450 K, and the Stokes shift was calculated by measuring the energy difference between the absorption and emission peaks. We found that the Stokes shift decreased as QD shells were added and the temperature was increased, indicating a weaker electron–phonon coupling in the QDs with additional shells at higher temperature. Finally, the band gap of the QDs was measured as a function of temperature. The Debye temperature was obtained by empirically fitting the energy band gap." @default.
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- W1992318621 date "2012-02-06" @default.
- W1992318621 modified "2023-10-16" @default.
- W1992318621 title "Thermal and structural dependence of the band gap of quantum dots measured by a transparent film heater" @default.
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- W1992318621 doi "https://doi.org/10.1063/1.3682515" @default.
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