[3PS-017]
Antisolvent Engineering with Small Molecule Additives for Efficient Near-Infrared Perovskite Light-Emitting Diodes
발표자송승우 (광주과학기술원)
연구책임자김호범 (광주과학기술원)
Abstract
Formamidinium lead iodide (FAPbI₃) is widely studied as a near-infrared emitter for perovskite light-emitting diodes (NIR PeLEDs) owing to its narrow bandgap and favorable optoelectronic properties. Nevertheless, defects in FAPbI₃ form trap states that induce non-radiative recombination and cause ion migration, leading to structural instability. Here, we employ an antisolvent-assisted strategy to induce rapid nucleation during film formation, yielding dense and uniform perovskite films. Small-molecule additives incorporated into the antisolvent may interact with undercoordinated Pb²⁺ sites, possibly enabling effective defect passivation. Consequently, the optimized devices achieved a peak external quantum efficiency (EQE) of 10.8%, compared with 6.5% for the control device. These results indicate that incorporating small-molecule additives into the antisolvent is an effective approach for suppressing non-radiative recombination and improving the performance of FAPbI₃-based NIR PeLEDs.