Direct Blue‐LED Pumped Broadband Long‐Wavelength Near‐Infrared Emitter Based on Ni2+ Mono‐Doped Double Perovskite Materials for Versatile Optical Applications DOI Open Access
Zhihao Zhou, G. Ji,

Zhuowei Fei

et al.

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Abstract Long‐wavelength near‐infrared (NIR) phosphors (1000–2000 nm) have shown great promise in intelligent NIR spectroscopy technology fields. However, developing capable of directly absorbing blue light and emitting over 1000 nm still remains a significant challenge. Here, series ultra‐broadband with emission peaks longer than 1500 is achieved by incorporating single activator Ni 2+ ion into ALaMgMO 6 (A = Ca, Sr, Ba; M Sb, Nb, Ta) double perovskite hosts. Significantly, through composition modulation strategy, the designed exhibit an intense absorption band centered at 440 nm, making these mono‐doped pumped commercial LED chips without strictly introducing sensitized ions or energy transfer process. The origination effective blue‐light excitable NIR‐II to NIR‐III phosphor unraveled Rietveld structural refinement local symmetry analysis. Additionally, developed demonstrated potential spectroscopic analysis, night‐vision technology, non‐destructive visualization, information encryption identification. This work provides feasible strategy solve problem that ‐doped cannot be can promote development more long‐wavelength materials for multiple photonic applications.

Language: Английский

Stable and Highly Efficient Near‐Infrared Emission Achieved in Spinel Blocks DOI Open Access

Xi‐Bao Zhang,

Liang Zhou, Hongpeng You

et al.

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

Published: Feb. 3, 2025

Developing efficient and stable near-infrared emitters related to Cr3+-pairs for advanced optoelectronic devices remains a challenge due concentration quenching effects unclear luminescence mechanisms. In this study, Cr3+ ions are incorporated into matrix structure consisting of ZnAl₂O₄ spinel units separated by 11.312 Å, effectively restricting energy transfer between luminescent centers alleviating effects. Computational analysis identifies the lattice positions isolated at different doping levels, providing insights their spatial distribution local structural environments. Photoluminescence measurements reveals Cr3+-concentration-dependent emission broadening, with Cr3+-pair band peak 750 nm, while detailed spectral further clarified level first time. Enhanced material performance is achieved through flux-assisted synthesis, reaching high external quantum efficiency 58.3%. Consequently, assembled pc-LEDs exhibit minimal roll-off achieve output 183 mW 650 mA, demonstrating potential in light sources night vision technology application.

Language: Английский

Citations

0
Zero-thermal-quenching broadband NIR-II emitting Mg4Nb2O9: Ni2+ phosphor via defective engineering and multi-site occupation DOI
Hua Yu,

Zhexuan Gao,

Huanping Wang

et al.

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179519 - 179519

Published: March 1, 2025

Language: Английский

Citations

0
Insights into the fluorescence, afterglow and thermoluminescence mechanisms of the Er-doped Mg2SnO4 system and unusual electron traps DOI
Hongyu Wu, Qiang Liu,

Yanhao Huang

et al.

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

Published: March 1, 2025

Language: Английский

Citations

0
Neighboring‐Cation Substitution Engineering Strategy toward High Performance in Near‐Infrared Light Source for Multifunctional Applications DOI Open Access
Qiang Zhang, Xin Ding, Hongzhe Zhang

et al.

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

Published: March 5, 2025

Abstract Efficient broadband near‐infrared (NIR)‐emitting phosphors with long‐wavelength emission peaks and high thermal stability are urgently needed as next‐generation smart NIR light sources. However, considerable challenges remain in developing high‐performing phosphors. Herein, a blue LED excitable Bi 1.8 Ga 1.2 SbO 7 : Cr 3+ (BGS: ) phosphor broad band long peak is designed synthesized. Further, strategy of neighboring‐cation substitution engineering proposed to improve the efficiency phosphor. The optimal 0.02Cr , 0.8In can generate an 700–1300 nm range full‐width at half‐maximum (FWHM) 198 nm. This has external quantum (EQE) 31.3% good 56.1% 423 K. A fabricated NIR‐LED device achieve output power 125.55 mW 300 mA photoelectric 17.45% 20 mA, demonstrating its application potential for night vision, bioimaging nondestructive detection. study offers new thoughts fulfill outstanding luminescent performances.

Language: Английский

Citations

0
Direct Blue‐LED Pumped Broadband Long‐Wavelength Near‐Infrared Emitter Based on Ni2+ Mono‐Doped Double Perovskite Materials for Versatile Optical Applications DOI Open Access
Zhihao Zhou, G. Ji,

Zhuowei Fei

et al.

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Abstract Long‐wavelength near‐infrared (NIR) phosphors (1000–2000 nm) have shown great promise in intelligent NIR spectroscopy technology fields. However, developing capable of directly absorbing blue light and emitting over 1000 nm still remains a significant challenge. Here, series ultra‐broadband with emission peaks longer than 1500 is achieved by incorporating single activator Ni 2+ ion into ALaMgMO 6 (A = Ca, Sr, Ba; M Sb, Nb, Ta) double perovskite hosts. Significantly, through composition modulation strategy, the designed exhibit an intense absorption band centered at 440 nm, making these mono‐doped pumped commercial LED chips without strictly introducing sensitized ions or energy transfer process. The origination effective blue‐light excitable NIR‐II to NIR‐III phosphor unraveled Rietveld structural refinement local symmetry analysis. Additionally, developed demonstrated potential spectroscopic analysis, night‐vision technology, non‐destructive visualization, information encryption identification. This work provides feasible strategy solve problem that ‐doped cannot be can promote development more long‐wavelength materials for multiple photonic applications.

Language: Английский

Citations

0