Fig. 6From: Phase Engineering for Highly Efficient Quasi-Two-Dimensional All-Inorganic Perovskite Light-Emitting Diodes via Adjusting the Ratio of Cs Cationa Schematic diagram of the device structure and b corresponding energy level for the PeLEDs. c Current density versus voltage curves (J-V), d luminance versus voltage (L-V), and e current efficiency versus voltage (CE-V) characteristic curves of PeLEDs based on different perovskite films. f Normalized EL spectraBack to article page