Progress and Challenges in Enhancing the Operational Lifetime of Blue Perovskite LEDs: A Review

Abstract Perovskite light‐emitting diodes (PeLEDs) have demonstrated remarkable potential in the race for next‐generation display technologies due to their outstanding optoelectronic properties. While significant progress is made in improving device efficiency, the device half lifetime (T ₅₀ ) of PeLEDs still falls far short of industrial requirements. Green and red PeLEDs have achieved device half lifetimes on the order of thousands to tens of thousands of hours, whereas blue PeLEDs remain limited to several hundred hours, posing a critical bottleneck to commercialization. In this review, recent advances aimed at extending the device half lifetime of blue PeLEDs are summarized. Also, the key challenges are discussed that hinder the stability of blue‐emitting devices. Finally, a brief outlook and conclusion on future research directions are provided for improving the lifetime of PeLEDs.