Comprehensive Review on Stability of Quasi‐2D Perovskite LEDs: Mechanistic Insights Into Intrinsic/Extrinsic Degradation and Innovative Stabilization Strategies

Abstract

ABSTRACT Quasi‐two‐dimensional (quasi‐2D) perovskite light‐emitting diodes (PeLEDs) have gained a strong competitive edge in next‐generation display, thanks to their exceptional electronic and optical properties. In recent years, the performance of quasi‐2D PeLEDs has advanced steadily, with their external quantum efficiency (EQE) climbing to approximately 30%, highlighting immense development potential. However, the operational stability of these devices remains a critical bottleneck, severely limiting their commercialization. Consequently, this review focuses on the influencing factors and mechanisms governing the stability of quasi‐2D perovskites. Centering on the stability of quasi‐2D PeLEDs, we first systematically analyze the key stability‐affecting factors from the dual dimensions of intrinsic and extrinsic causes. Subsequently, we summarize strategies for enhancing the stability of quasi‐2D PeLEDs, including component regulation, additive regulation, phase distribution regulation, device structure regulation, process parameter regulation, and so on. Finally, we outline the challenges and opportunities currently faced in achieving stable quasi‐2D PeLEDs, providing a clear direction for the development of high‐performance, long‐lifetime quasi‐2D PeLEDs.