Fig. 4
From: Color-stable highly luminescent sky-blue perovskite light-emitting diodes
EL performance of PeLEDs. a Current density-voltage, b luminance-voltage, c EQE-current density, d power efficiency-voltage and e current efficiency-voltage characteristics of PeLEDs made from perovskite films with different thickness: Device I (125 nm), Device II (80 nm), Device III (60 nm), and Device IV (40 nm). f−h Histogram of maximum luminance, EQEs, current efficiency for 15 Devices IV from four batches. Average luminance of 1758 cd m−2 with a relative standard deviation of 22%, average EQE of 1.0% with a relative standard deviation of 11% and average current efficiency of 1.9 cd A−1 with a relative standard deviation of 14%
