Excitation-Independent Emission of Carbon Quantum Dot Solids

Figure 3

(a) PL spectra of CQD solution in EtOH (filled) and CQD film (open) excited at different excitation wavelengths. (b) and (c) Pictures of the CQD solution and film under the UV lamp (365 nm). (d) Normalized PLE spectra monitored at different wavelengths of CQDs dissolved in EtOH or in thin film.