Fig. 6
From: High-Performance Quasi-2D Perovskite Light-Emitting Diodes Via Poly(vinylpyrrolidone) Treatment
a Luminance versus voltage (L-V), b current density versus voltage curves (J-V), and c current efficiency versus current density (CE-J) characteristic curves of quasi-2D PeLEDs based on different PVP concentrations. d Normalized EL spectra of quasi-2D PeLEDs based on different PVP concentrations. Bright EL photography of quasi-2D PeLED with 3 mg/mL PVP is shown in the inset