Ultrastable near-infrared perovskite light-emitting diodes

Perovskite light-emitting diodes are an emerging light source technology. However, similar to perovskite solar cells, poor operational stability remains obstacle for commercial applications. Here we demonstrate ultrastable and efficient near-infrared (~800 nm) with record-long lifetimes (T50, extrapolated) of 11,539 h (~1.3 years) 32,675 (~3.7 initial radiance (or current densities) 3.7 W sr?1 m?2 (~5.0 mA cm?2) 2.1 (~3.2 cm?2), respectively, even longer forecasted lower radiance. Key this is the introduction a dipolar molecular stabilizer, which interacts cations anions at grain boundaries. This suppresses ion migration under electric fields, preventing formation lead iodide, mediates phase transformation decomposition ?-FAPbI3 perovskite. These results remove critical concern that halide devices may be intrinsically unstable, paving path towards industrial Near-infrared extrapolated device lifespans on scale years achieved by use stabilizer.