POS5-1354
Antisolvent Engineering with Small Molecule Additives for Efficient and Stable Near-Infrared Perovskite Light-Emitting Diodes
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
Seungwoo Song (Gwangju Institute of Science and Technology (GIST))
Co-Author(s)
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 films form trap states that induce non-radiative recombination and facilitate ion migration, leading to reduced device efficiency and 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.
Acknowledgements
This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (RS-2024-00342991). This research was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government (MSIT) (RS-2024-00437887). This research was supported by Korea Basic Science Institute(National research Facilities and Equipment Center) grant funded by the Ministry of Science and ICT (RS-2026-25500164). This research was supported by the Digital Research Innovation Institution Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (RS-2023-00283597).
Acknowledgements
This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (RS-2024-00342991). This research was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government (MSIT) (RS-2024-00437887). This research was supported by Korea Basic Science Institute(National research Facilities and Equipment Center) grant funded by the Ministry of Science and ICT (RS-2026-25500164). This research was supported by the Digital Research Innovation Institution Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (RS-2023-00283597).
