Spatial Crystallization Homogenization Boosts Scalable Perovskite Light‐Emitting Diodes
Abstract
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.
Article Details
Authors (14)
Yu Xia
Jia‐Cheng Li
State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou China
Zhipeng Zhang
College of Materials Science and Engineering
Nan Li
Ye Wang
Yu‐Han Li
State Key Laboratory of Bioinspired Interfacial Materials Science, Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou 215123 P. R. China
Kai‐Li Wang
Institute of Functional Nano & Soft Materials (FUNSOM) State Key Laboratory of Bioinspired Interfacial Materials Science Soochow University Suzhou China
Chun‐Hao Chen
Institute of Functional Nano & Soft Materials (FUNSOM) State Key Laboratory of Bioinspired Interfacial Materials Science Soochow University Suzhou China
Jing Chen
Lei Huang
BLSA-ZJU Research Center and Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.
Yu‐Tong Yang
Institute of Functional Nano & Soft Materials (FUNSOM) State Key Laboratory of Bioinspired Interfacial Materials Science Soochow University Suzhou China
Guichuan Xing
Baoquan Sun
Institute of Functional Nano and Soft Materials (FUNSOM) Soochow University Suzhou 215123 China
Zhao‐Kui Wang
Institute of Functional Nano & Soft Materials (FUNSOM) State Key Laboratory of Bioinspired Interfacial Materials Science Soochow University Suzhou China