Energy & Fuels, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 4, 2024
Language: Английский
Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(16)
Published: March 14, 2024
Abstract The utilization of phosphor‐converted light‐emitting diodes (pc‐LEDs) as compact short‐wave infrared (SWIR) emitters has emerged a promising strategy for miniature SWIR spectrometers in portable devices, enabling diverse applications such nondestructive identification, bioimaging, night‐vision surveillance, and optical communication. However, discovering phosphors capable efficiently absorbing blue light emitting pure (>900 nm) remains significant challenge. Here, highly efficient thermally stable luminescence Yb 3+ upon LED excitation by employing Cr –Yb energy transfer Y 3 Ga 5 O 12 garnet is reported. prepared :Cr ,Yb phosphor exhibits intense emission spanning from 900 to 1150 nm at 438 excitation, coupled with ultra‐high internal/external quantum efficiency 80.8%/40.2% excellent thermal stability (108%@150 °C). A pc‐LED prototype fabricated incorporating the optimized commercial 450 chip, shows exceptional performance, delivering output power 92.7 mW driving current 350 mA photoelectric 21.5% 10 mA. This work opens up new avenue designing that exhibit photoluminescence demonstrating potential next‐generation high‐power sources.
Language: Английский
Citations
19
Laser & Photonics Review, Journal Year: 2024, Volume and Issue: unknown
Published: Aug. 3, 2024
Abstract Near‐infrared (NIR) phosphors are a vital component of phosphor‐converted light‐emitting diodes (pc‐LEDs), with simultaneous high quantum efficiency and thermal stability being essential attributes for optimal performance. In this paper, novel ZnAlB (1‐ x ) Ga O 4 :0.05Cr 3+ system is designed by gradually substituting B Ga. Surprisingly, significant enhancement in photoluminescence performance observed, reaching peak at = 1. Further development led to series ZnAlGaO : y Cr (ZAGO: phosphors, exhibiting variable full width half maximum (FWHM) ranging from 32 163 nm increasing content, attributed energy transfer between two emission centers. Among these, ZAGO:0.05Cr emerges as the phosphor, boasting internal/external 80%/34% FWHM 80 nm. Notably, phosphor demonstrates anti‐thermal quenching behavior (125.53% @ 423 K), its exceptional elucidated through defect level model. The fabricated NIR pc‐LEDs featuring ZAGO:Cr show great prospect multifunctional applications plant cultivation, night vision, non‐destructive analysis veins imaging.
Language: Английский
Citations
8
Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Journal Year: 2024, Volume and Issue: 319, P. 124570 - 124570
Published: May 31, 2024
Language: Английский
Citations
7
Ceramics International, Journal Year: 2024, Volume and Issue: 50(18), P. 34153 - 34163
Published: June 17, 2024
Language: Английский
Citations
6
Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(34), P. 13268 - 13278
Published: Jan. 1, 2024
A cation site modulation strategy is proposed to regulate the emission wavelength of Fe 3+ -activated spinel phosphors with superior anti-quenching properties.
Language: Английский
Citations
5
Journal of Luminescence, Journal Year: 2025, Volume and Issue: unknown, P. 121079 - 121079
Published: Jan. 1, 2025
Language: Английский
Citations
0
Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 6, 2025
Broadband near-infrared (NIR) luminescent materials exhibit great potential in many fields including nondestructive examination, biological imaging, and night vision. Herein, the tunable NIR emission can be realized based on Sr2MTaO6:Cr3+ (M = Ga, Sc, In) tantalate phosphors with a double-perovskite structure, peak varying from 782 to 880 nm via cation modulation. Specifically, after being stimulated by 460 blue light, Sr2GaTaO6/Cr3+ phosphor demonstrates broadband full width at half-maximum (fwhm) over 180 nm, originating two octahedral sites of Ga3+ Ta5+ Sr2GaTaO6 that occupied Cr3+ ions. By using Yb3+ codoping strategy, efficient energy transfer process (Cr3+ → Yb3+) enables remarkable expansion fwhm 304 significant improvement thermal stability due suppressive quenching behavior Ultimately, mixing Sr2GaTaO6/Cr3+, an epoxy adhesive coating LED chip, pc-LED device was successfully fabricated, its prospective usage testing vision evaluated. This work contributes exploration light effectively stimulating broad-band NIR-emitting phosphors.
Language: Английский
Citations
0
Journal of Materials Science Materials in Electronics, Journal Year: 2025, Volume and Issue: 36(6)
Published: Feb. 1, 2025
Language: Английский
Citations
0
Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown
Published: March 22, 2025
Abstract To settle the unsatisfied efficiency of near‐infrared (NIR) emission in lanthanide‐doped luminescent materials, a series Pt 4+ ‐doped and /Er 3+ ‐codoped Cs 2 ZrCl 6 double perovskite phosphors are designed. Excited by 254 nm, compounds can exhibit characteristic emissions host , resulting polychromatic luminescence caused efficient energy transfer from to . Through combining theoretical calculation profiles, it is clear that broadband at 660 nm assigned self‐trapped exciton [PtCl ] 2− octahedron. Furthermore, compared with Er sample, intensity NIR‐II 1540 greatly improved, namely, 127‐fold increase, due quantum efficiencies visible :0.6%Pt /25%Er phosphor 75.5% 34%, respectively, excited nm. Additionally, via utilizing designed phosphors, various applications including multilevel anti‐counterfeiting, non‐visual imaging, night vision, etc., realized. This finding implies be efficiently regulated using multi‐channel composite engineering.
Language: Английский
Citations
0
Ceramics International, Journal Year: 2025, Volume and Issue: unknown
Published: May 1, 2025
Language: Английский
Citations
0