Journal of Rare Earths, Год журнала: 2025, Номер unknown
Опубликована: Май 1, 2025
Язык: Английский
Journal of Rare Earths, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
2
Luminescence, Год журнала: 2025, Номер 40(1)
Опубликована: Янв. 1, 2025
ABSTRACT Er 3+ ‐doped BaF 2 single crystals were investigated with two primary aims: first, to probe the infrared emissions from 4 I 11/2 level (around 1.0 μm) under 1500‐nm excitation and, second, use crystal enhance efficiency of silicon‐based solar cells through upconversion mechanism. Upon at 1500 nm, emission spectrum crystals, recorded in range 480–1080 exhibited well‐structured visible bands 538 and 650 along a strong near 971 nm. This 971‐nm has an cross‐section approximately 0.23 × 10 −20 cm . As any phenomenon inherent energy transfer by upconversion, fluorescence decay exhibits rise time followed long 15 ms positive optical gain low values population inversion coefficient, which could potentially give laser this level. When we place our on photovoltaic device illuminated wavelength radiation, record photocurrent 300 μA illumination power 85 mW. indicates that is highly suitable for significantly enhancing cells.
Язык: Английский
Процитировано
1
Journal of the American Ceramic Society, Год журнала: 2025, Номер unknown
Опубликована: Март 22, 2025
Abstract Mechanoluminescence (ML) materials have shown broad application potentials in stress sensing and structural monitoring due to situ, real‐time monitoring, low trigger threshold. However, the accurate detection of distribution inside machinery still faces certain challenges. Based on a flexible ML film prepared by SrAl 2 O 4 : Eu 2+ , Dy 3+ phosphor polydimethylsiloxane, this paper proposes “stress difference” strategy monitor mechanical structure. By applying different loads recording linear relationship between intensity load, local engine bearing can be measured. comparing difference I PersL specific machine is successfully inferred. This study provides new ideas for sensing, which may open up an innovative method structures.
Язык: Английский
Процитировано
1
Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162575 - 162575
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
1
Laser & Photonics Review, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 9, 2024
Abstract Near‐infrared mechanoluminescent (NIR ML) materials have attracted attention due to their advantages, such as in situ and real‐time monitoring of biomechanical information vivo. However, most ML are focused on the UV–vis light range, which limits potential applications biological field. In this work, a broadband NIR material Ca 2 YGa 3 Ge O 12 : 0.10Cr 3+ (CYGGG: ) is successfully prepared by chemical co‐substitution Cr heavy doping. Density functional theory (DFT) calculations used determine type defects material, composite formed interstitial oxygen (i ′′) antisite (Ca Y ′ ‐ °) mostly dominate ML. ions act electronic bridges regulate energy levels, becoming key turning Nd ion's Finally, based excellent properties CYGGG: , 0.01Nd composites can penetrate pork tissues different compositions/thicknesses under stress loads. Potentially, work tries realize tissue imaging, providing new way for application materials.
Язык: Английский
Процитировано
4
Laser & Photonics Review, Год журнала: 2025, Номер unknown
Опубликована: Янв. 14, 2025
Abstract Mechanoluminescence (ML) has always attracted much attention due to the broad prospects in various fields. However, types of ML materials are still limited. Here, traps introduced by means X‐ray irradiation, and finally a high brightness visible naked eye during daytime 20 s afterglow is obtained Cs 2 HfCl 6 : Te 4+ Inorganic Lead‐free halide perovskites (ILFHPs). This work will promote further development provide way thinking for exploration new materials.
Язык: Английский
Процитировано
0
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 29, 2025
Abstract Broadband near‐infrared (NIR) fiber arrays are highly desirable for multiplexed fluorescence endoscopic, however, there is a challenge the development of miniature light sources with efficient broadband NIR emissions. Here synthesis MgAl 2 O 4 :Cr 3+ nanocrystal‐glass composite (NGC) an Cr ‐clusters‐induced emission possessing presented and external quantum efficiency 44% full width at half maximum 297 nm, NGC further fabricated through template solidification strategy, resulting in construction all‐fiber coupling system by fusing them commercial quartz that achieves optical 95.2%. Furthermore, these fibers regularly arranged into bundle as array source to enhance luminescence imaging ability, mm biological tissue penetration realized, well imaging, under irradiation bundle. This study provides general fabrication guidelines toward sources, opening new routes endoscopes.
Язык: Английский
Процитировано
0
Ceramics International, Год журнала: 2025, Номер unknown
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
0
Laser & Photonics Review, Год журнала: 2025, Номер unknown
Опубликована: Фев. 25, 2025
Abstract Brighter, recoverable, and more practical green mechanoluminescence (ML) materials are urgently required in diverse fields such as visual stress sensing advanced display lighting. Ce 3+ /Eu 2+ doping, leveraging efficient f ‐ d transition, remains one of the most promising approaches for achieving high‐performance ML. However, intense competition between afterglow ML necessitates precise control trap depths to develop high‐brightness recoverable doped trap‐controlled systems. In this work, concept multilevel is introduced into Eu ‐doped MGa 2 S 4 ( M = Sr, Ca) and, first time, elucidate mechanism underlying irradiation‐induced recovery powdered : dominated by shallow‐level traps. By optimizing activator doping concentration, depth distribution traps effectively fine‐tuned, remarkable peak intensity compared with renowned SrAl O (~57.3% , Dy ~84.3% (Sr, Ca)Al ) while minimizing interference. Finally, application potential SrGa :Eu demonstrated employing fluorescent coatings visualize crack propagation construction materials. This study explores broader applications ⁺ technologies offers novel insights strategies developing
Язык: Английский
Процитировано
0
Materials Horizons, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Near infrared mechanoluminescence (NIR-ML) materials have attracted the attention of researchers due to their unique advantages, such as high resistance bright-field interference and higher penetration depth into biological tissues. However, reported NIR-ML are mainly rare-ion-activated narrow-band emitters. In this work, we report a material BaGa12O19:Cr3+ by solid state reaction method. Broad NIR ML (650-1000 nm) is observed at lower force loads (12 N), which based on Cr3+ ion's multi-lattice site occupation. After heat treatment 573 K for 20 min, still maintains 84.4% its intensity. Furthermore, intensity also significantly improved after UV pre-irradiation. Due defective piezoelectric photonic effect, has great self-recoverable properties even in absence sunlight irradiation. Finally, rate reached 66.97% tissues, suggests potential prospects biostress detection towards bio-imaging applications.
Язык: Английский
Процитировано
0