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

钙钛矿发光二极管是一种新兴的光源技术。然而，与钙钛矿太阳能电池类似，较差的运行稳定性仍然是商业应用的障碍。在这里，我们展示了超稳定和高效的近红外（~800 nm）钙钛矿发光二极管，其初始辐射的使用寿命（T ₅₀，外推）分别为 11,539 小时（~1.3 年）和 32,675 小时（~3.7 年） （或电流密度）为 3.7 W sr ^-1  m ^-2 (~5.0 mA cm ^-2 ) 和 2.1 W sr ^-1  m ^-2 (~3.2 mA cm ^-2），分别预测更低的辐射寿命更长。这种稳定性的关键是引入偶极分子稳定剂，它与钙钛矿晶界处的阳离子和阴离子相互作用。这抑制了电场下的离子迁移，防止了碘化铅的形成，碘化铅介导了 α-FAPbI ₃钙钛矿的相变和分解。这些结果消除了卤化物钙钛矿器件可能本质上不稳定的关键问题，为工业应用铺平了道路。