[3PS-017]
Antisolvent Engineering with Small Molecule Additives for Near-Infrared Perovskite LEDs
발표자송승우 (광주과학기술원)
연구책임자김호범 (광주과학기술원)
Abstract
Formamidinium lead iodide (FAPbI₃) is widely studied for near-infrared perovskite light-emitting diodes (NIR PeLEDs) owing to its narrow bandgap. However, FAPbI₃ exhibits a low exciton binding energy and defects of iodide vacancies and undercoordinated Pb²⁺, which lead to exciton dissociation and non-radiative recombination. In this work, we employ antisolvent treatment strategies to regulate the crystallization of FAPbI₃ by accelerating the initial nucleation process. Also, we introduce small-molecule additives into the antisolvent, which effectively passivate defects and reduce grain size. Consequently, the resulting films exhibit a dense morphology, suppressed non-radiative recombination via defect passivation, and enhanced exciton confinement. This study demonstrates that incorporating small-molecule additives into the antisolvent is an effective strategy for enhancing the efficiency and operational stability of FAPbI₃-based NIR PeLEDs.