Modification of mixed-halide quasi-2D perovskites by aminophylline towards efficient and spectrally stable blue light-emitting diodes with low efficiency roll-off

Blue perovskite light-emitting diodes (PeLEDs) based on the quasi two-dimensional (quasi-2D) perovskites with chloride (Cl) and bromine (Br) ions have made significant progress in improving external quantum efficiencies (EQEs) during...