Novel Lead‐Free Stable Fluorite Nanocrystals and Their Applications in Light‐Emitting Diodes

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Abstract The toxicity and the poor thermal stability of all‐inorganic lead perovskite nanocrystals (NCs) have been major limitation for their scale‐up purpose. In this study, a novel lead‐free KEu 4 F 13 NCs are synthesized first time using facile eco‐friendly hydrothermal strategy. High‐resolution synchrotron X‐ray diffraction study indicates that adopt cubic fluorite structure with excess fluorine intercalated into spare rooms lattice. obtained characteristic emission peaks Eu 3+ ions excited by wavelength 394 nm. More importantly, show excellent due to small radius − its high lattice energy. relative photoluminescence (PL) intensity at 594 nm retains ≈72% initial value 20 °C when heated 200 °C. Furthermore, PL shows negligible degradation after undergoing three consecutive cycles between (XRD) remain identical those cycled samples (after 1st/3rd cycles), confirming structural robustness under stress. lifetimes measured 180 calculated be 2.10 2.04 ms, respectively. red‐emitting encapsulated on an ultraviolet (UV)‐emitting chip fabricate red light‐emitting diodes (LED).

Language: Английский

Eco-Friendly Lead-Free Metal Halide Perovskites: Progress and Prospects in Multifunctional Applications

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180365 - 180365

Published: April 1, 2025

Language: Английский