[2PS-129]
Surface-Brominated CsPbI₃ Nanocrystals Enabling High-Performance Red Electroluminescence for Wearable Display Applications
발표자이경훈 (대구경북과학기술원)
연구책임자양지웅 (대구경북과학기술원)
Abstract
All-inorganic halide perovskites are promising emitters for next-generation displays due to their tunable emission, narrow spectra, and high radiative efficiency. Among them, achieving pure red emission from ~10 nm CsPbI₃ nanocrystals remains challenging. Here, we report a mild post-synthetic halide exchange that incorporates bromide into CsPbI₃ nanocrystals (CsPbI₃:Br) without altering their core crystal structure. These modified nanocrystals exhibit enhanced red luminescence and improved charge transport. Red-emitting PeLEDs fabricated with CsPbI₃:Br achieve an EQE of 19.8%, comparable to leading devices. Furthermore, we demonstrate their integration into thin, flexible platforms capable of withstanding bending and deformation, enabling conformal attachment to curved surfaces. This approach offers a simple yet effective route to color-pure red-emitting perovskite nanocrystals and highlights their applicability in future flexible and wearable optoelectronic systems.