Multifunctional Applications Enabled by Tunable Multi-Emission and Ultra-Broadband VIS-NIR Luminescence via Energy Transfer in Sn²⁺/Mn²⁺-Doped Lead-Free Zn-Based Metal Halides

Materials Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Metal halides are widely applied in solid-state lighting (SSL), optoelectronic devices, information encryption, and near-infrared (NIR) detection due to their superior photoelectric properties tunable emission. However, single-component phosphors that can be efficiently excited by light-emitting diode (LED) chips cover both the visible (VIS) NIR emission regions still very rare. To address this issue, (TPA)2ZnBr4:Sn2+/Mn2+ (TPA = [(CH3CH2CH2)4N]+) were synthesized using solvent evaporation method. The Sn2+ doping significantly enhances luminescence of (TPA)2ZnBr4, shifts weak blue light efficient emissions red zones. Spectroscopic studies density functional theory (DFT) calculations reveal attributed different levels 3P1-1S0 [SnBr4]2- tetrahedron caused Jahn-Teller distortion. More importantly, energy transfer from Mn2+ enables ultra-broadband VIS-NIR across 400-1000 nm range, with excitation-dependent characteristics. These suggest has great potential as a high-performance, luminescent material for applications general lighting, source, anti-counterfeiting labels.

Language: Английский

Efficient Tunable White Emission and Blue Light‐Excited Near‐Infrared Emission in Lead‐Free Metal Halide Crystals with Ultra‐High Luminous Efficiency for Multispectral Image Fusion and 3D Image Reconstruction

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

Published: Jan. 26, 2025

Abstract 0D hybrid Sb(III) halides generally exhibit unique crystal structure and efficient emission. However, achieving white light blue light‐excited near‐infrared (NIR) emission remains an enormous challenge. Herein, a series of (18‐crown‐6@K) 2 SbX 5 (X = Cl, Br) crystals with different Cl/Br rations are synthesized via supramolecular self‐assembly. All compounds show the broadband emission, which stems from self‐trapped excitons in [SbX ] 2− pseudo‐octahedral structure. Particularly, SbCl shows tunable under various excitation wavelengths, ultra‐high luminous efficiency 92.3% is obtained 310 nm excitation. As Br gradually replaces not only bands red‐shift but also facilitate intersystem crossing process singlet to triplet excitons. Thus, independent NIR upon 450 58.2% SbBr crystals. Moreover, high‐performance single‐component light‐emitting diode (WLED) based on LED fabricated, image fusion realized. Finally, combined multiangle imaging WLED irradiation, 3D reconstruction centrifuge tube wrapped capsule successfully demonstrated.

Language: Английский

Self-Trapped Exciton Luminescence of Sb-Doped Zirconium-Based Metal Halide and Anti-Counterfeiting Encryption Application

Published: Jan. 1, 2025

Language: Английский