Fig. 5 | Nature Communications

Fig. 5

From: Engineering triangular carbon quantum dots with unprecedented narrow bandwidth emission for multicolored LEDs

Fig. 5

LED structure, energy diagram, and performance characterization. The device structure (a) and energy level diagram (b) of the NBE-T-CQDs-based LEDs. EL spectra of the B- (c), G- (d), Y- (e), and R-LEDs (f) at different bias voltage, respectively. (Insets are the operation photographs of the B-, G-, Y-, and R-LEDs with the logo of BNU). The maximum luminance–current–voltage (L–I–V) characteristic of B- (g), G- (h), Y- (i), and R-LEDs (j), respectively. The current efficiency versus current density (k) and the stability plots (l) of the B-, G-, Y-, and R-LEDs

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