Figure 6: | Scientific Reports

Figure 6

From: Design of Carbon Dots Photoluminescence through Organo-Functional Silane Grafting for Solid-State Emitting Devices

Figure 6

(a) Photoluminescence spectra of GPTMS – C-dots (black line) and GPTMS – GC-dots (red line) nanocomposite films excited at 365 nm. The emission of C-dots in water (green line) excited at the same wavelength is reported as reference. (b,c) excitation-emission-intensity spectra of the films, prepared from pristine C-dots and GPTMS-grafted C-dots, dispersed in GPTMS sol through sol-gel process. Photoluminescence intensity, normalized by the peak-top count, is reported in false color scale from blue to red (0–100%). The inset of Fig. 6a shows the appearance of these films under UV lamp irradiation (λ = 365 nm). The spectrum region with an emission intensity higher than 25% of C-dots in water is shown as reference (white dotted line). The black dotted line represents the estimated new emission area peaked at around 490 nm.