Spatial Crystallization Homogenization Boosts Scalable Perovskite Light-Emitting Diodes.
basic_science · Level V
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- Record sourced from PubMed, PMID 40746229.
- Also identified by DOI 10.1002/adma.202506413.
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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<sup>2</sup>) 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<sup>2</sup>. This work provides a fundamental advancement in perovskite crystallization control and demonstrates a viable pathway toward industrial-scale production of PeLEDs.