Spatial Crystallization Homogenization Boosts Scalable Perovskite Light‐Emitting Diodes

作者：Yu Xia, Jiacheng Li, Zhipeng Zhang, Nan Li, Y. A. Wang, Yu‐Han Li, Kai‐Li Wang, Chun‐Hao Chen, Jing Chen, Lei Huang, Yutong Yang, Guichuan Xing, Baoquan Sun, Zhao‐Kui Wang · 发表于：Advanced Materials · 年份：2025 · DOI：10.1002/adma.202506413 · 被引用次数：10 · 研究领域：Perovskite Materials and Applications、Quantum Dots Synthesis And Properties、Organic Light-Emitting Diodes Research

Abstract Conventional antisolvent dripping methods face fundamental limitations in controlling crystallization kinetics, particularly manifesting as instantaneous nucleation and severe spatial inhomogeneity in scaled‐up perovskite films. Herein, a microdroplet‐phase antisolvent deposition technique is developed that establishes a controlled crystallization environment through delayed nucleation kinetics via mild antisolvent interaction and uniform microdroplet diffusion across extended substrates. The resulting small‐area (0.1 cm 2 ) device attains an external quantum efficiency (EQE) of 30.98% at 515 nm, ranking among the best‐performing green perovskite light‐emitting diodes (PeLEDs). A remarkable EQE of 23.21% is also realized when the active area expands to 6.25 cm 2 . This work provides a fundamental advancement in perovskite crystallization control and demonstrates a viable pathway toward industrial‐scale production of PeLEDs.