Figure 5
(a) Photoluminescence spectra of B, N-CQDs at different excitation wavelengths 270,280,290,300 and 330nm. (b) Photoluminescence spectra of CQDs at different excitation wavelengths 300,330,350, and 380 nm. (c) Comparison of fluorescence spectra of B, N-CQDs, and CQDs with an excitation wavelength of 330 nm.
