Colloidal Synthesis of Blue-Emitting Cs3TmCl6 Nanocrystals via Localized Excitonic Recombination for Down-Conversion White Light-Emitting Diodes DOI
Meng Wang, Xu Chen, Fei Zhang

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(44), P. 30421 - 30432

Published: Oct. 25, 2024

Lead-halide perovskite nanocrystals (NCs) have gained significant attention for their promising applications in lighting and display technologies. However, blue-emitting NCs struggled to match the high efficiency of red green counterparts. Moreover, many reported contain heavy metal lead (Pb), which poses risks human health environment. In this study, we synthesized rare-earth-based Cs3TmCl6 via hot injection method, exhibit a broadband blue emission at 440 nm. Combined experimental theoretical studies indicate that arises from self-trapped excitons due excited-state structural distortion [TmCl6]3– cluster. Furthermore, ultrafast dynamics charge carriers were analyzed using time-resolved photoluminescence transient absorption measurements. Encouraged by remarkable thermal, light, water stabilities NCs, as evidenced results, white light-emitting diode was further designed fabricated color converter. The device exhibits outstanding performance, achieving long half-lifetime 336 h large color-rendering index 87.0. Combining eco-friendly features facile synthesis mark breakthrough reliable emitter, showcasing future potential applications.

Language: Английский

Pb2+-Doped Zero-Dimensional Zinc-Based Halides Possess High Green Purity and Narrow-Band Emission DOI
Zhipeng Xiong,

Changhui Miao,

Yanhua Fu

et al.

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

Citations

0
Achieving Luminous Efficiency Enhancement and Near‐Infrared Emission in Moisture‐Stable 0D Zinc‐Based Halides DOI
Wei Wang, Xinyang Zhang,

Hanrui Liao

et al.

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 4, 2024

Abstract Zero‐dimensional (0D) metal halides are attractive due to their structure‐dependent and tunable photoluminescence properties. Herein, a new 0D organic–inorganic hybrid Zn‐based halide, (C 4 H 12 N 2 )ZnBr , featuring long‐term stable crystal structure moisture‐stable PL emission under various extreme conditions is reported. A strong electron–phonon coupling effect enables the halide display highly efficient blue light at 472 nm with large Stokes shift of 7385 cm −1 . Intriguingly, heterovalent substitution Cu + ‐Zn 2+ further enhances quantum efficiency 60% as introduction effectively suppresses nonradiative recombination process. Besides, formation twisted [SbBr ] − tetrahedra via Sb 3+ help achieve broadband near‐infrared (NIR) (760 nm) full width half maxima (FWHM) 203 nm, enabling potential applications in night‐vision nondestructive fruit damage inspection. Detailed structural optical analyses used investigate photophysical processes different self‐trapped exciton (STE) for pristine /Sb ‐doped halides. These findings advance understanding spectral regulation mechanism initiate more exploitation luminescent emerging applications.

Language: Английский

Citations

2
Colloidal Synthesis of Blue-Emitting Cs3TmCl6 Nanocrystals via Localized Excitonic Recombination for Down-Conversion White Light-Emitting Diodes DOI
Meng Wang, Xu Chen, Fei Zhang

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(44), P. 30421 - 30432

Published: Oct. 25, 2024

Lead-halide perovskite nanocrystals (NCs) have gained significant attention for their promising applications in lighting and display technologies. However, blue-emitting NCs struggled to match the high efficiency of red green counterparts. Moreover, many reported contain heavy metal lead (Pb), which poses risks human health environment. In this study, we synthesized rare-earth-based Cs3TmCl6 via hot injection method, exhibit a broadband blue emission at 440 nm. Combined experimental theoretical studies indicate that arises from self-trapped excitons due excited-state structural distortion [TmCl6]3– cluster. Furthermore, ultrafast dynamics charge carriers were analyzed using time-resolved photoluminescence transient absorption measurements. Encouraged by remarkable thermal, light, water stabilities NCs, as evidenced results, white light-emitting diode was further designed fabricated color converter. The device exhibits outstanding performance, achieving long half-lifetime 336 h large color-rendering index 87.0. Combining eco-friendly features facile synthesis mark breakthrough reliable emitter, showcasing future potential applications.

Language: Английский

Citations

1