Efficient and Bright Deep-red Light-emitting Diodes Based on a Lateral 0D/3D perovskite Heterostructure

Bright and efficient deep-red light-emitting diodes (LEDs) are important for applications in medical therapy and biological imaging due to the high penetration of deep-red photons into human tissues. Metal-halide perovskites have potential to achieve bright and efficient electroluminescence due to their favorable optoelectronic properties. However, efficient and bright perovskite-based deep-red LEDs have not been achieved yet, due to either Auger recombination in low-dimensional perovskites or trap-assisted nonradiative recombination in three-dimensional perovskites. Here, we demonstrate a lateral Cs