Fig. 2 | Scientific Reports

Fig. 2

From: Green synthesis and multi-Gaussian analysis of carbon quantum dots from orange peels: optical properties, phonon interactions, and Huang-Rhys factor characterization

Fig. 2

(a) UV–Vis absorption spectra of the CQD dispersions. (b) Photoluminescence (PL) spectra recorded at various concentrations under excitation at \(\lambda _\text {exc}=320\) nm. (c, d) Variation of peak absorbance, integrated PL intensity, Gaussian peak energies, and corresponding full width at half maximum (FWHM) parameters—obtained from triple-Gaussian fitting of the PL spectra—as a function of CQD concentration.

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