Ultrabroadband NIR Phosphor CaMg₂Sc₂Ge₃O₁₂:Cr³⁺ for Multifunctional Applications

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

Published: Feb. 25, 2025

Abstract In this work, the high‐efficiency broadband garnet‐structured NIR phosphor, CaMg 2 Sc Ge 3 O 12 :Cr 3+ (CMSGO:Cr ), has been synthesized using a high‐temperature solid‐phase method. Under 455 nm excitation, CMSGO:Cr exhibits red to near‐infrared (NIR) emission with an ultra‐broad range of 600–1400 and maximum full width at half (FWHM) 273 nm. The Cr ions are found occupy dodecahedral octahedral sites in CMSGO, demonstrating good thermal stability 375 K maintaining 72% that room temperature. phosphor‐converted light emitting diode (pc‐LED) combining phosphor 460 chip excellent optical performance, output power 80 mW@400 mA, photoelectric conversion efficiency 15.69%@20 mA. Furthermore, vein hand, palm, fingers, wrist can be clearly observed under pc‐LED device from phosphor. food testing such as fish fruit is operated night vision improved obviously. All results demonstrate candidate for rapid medical examination imaging, non‐destructive testing, vision.

Language: Английский

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Direct Blue‐LED Pumped Broadband Long‐Wavelength Near‐Infrared Emitter Based on Ni²⁺ Mono‐Doped Double Perovskite Materials for Versatile Optical Applications

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

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Dual center luminescence characteristics and multifunctional applications of Li₂Ge₇O₁₅:Cr³⁺ near-infrared phosphors

Dalton Transactions, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Li 2 Ge 7 O 15 :Cr 3+ near-infrared phosphors have excellent thermal stability, high sensitivity and multifunctional applications.

Language: Английский

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Achieving tunable ultra-broadband NIR emission originating from the two-site occupation of Cr³⁺ ions in Mg₃Ga₂SnO₈:Cr³⁺

Inorganic Chemistry Frontiers, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The ultra-broadband emission spectrum of Mg 3 Ga 2 SnO 8 :Cr 3+ phosphor possesses excellent tunable properties. peak and full width at half maximum can be continuously regulating by adjusting the concentration Cr ions.

Language: Английский

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Bi³⁺/K⁺-Activated Calcium Lutetium Gallate and the Devices Under UV Chip for Warm WLED and Plant Lighting

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Due to indoor agriculture development, blue light is necessary for plant lighting. Here, a phosphor, CaLuGaO4 (CLGO):xBi3+ (x = 0.005, 0.0075, 0.01, 0.02, 0.04), has been synthesized using high-temperature solid-state method. The structure of orthorhombic, with space group Pnma, and Bi3+ doped into the host locate Ca Lu sites. Under 317 nm excitation, CLGO:Bi3+ exhibits broadband emission from 340 600 nm. In addition, K+ ions are introduced increase by 1.6 times. Meanwhile, thermal stability CLGO:Bi3+,K+ detected, 72% 75% CLGO:Bi3+,K+. Most importantly, 66.11% quantum efficiency achieved A LED device fabricated combined 365 chip, whose matches absorption spectra chlorophylls b. warm WLED also commercial red phosphor CaAlSiN3:Eu2+, green (Ba, Sr)2SiO4:Eu2+, CLGO:0.01 Bi3+,0.04K+ CCT 4679 K an Ra 87. All these results indicate that excellent candidate lighting WLED.

Language: Английский

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Multicolor Persistent Luminescence for High-Sensitivity Optical Temperature Sensing, Human Motion Detection, and Multimodal Anticounterfeiting Materials

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

Multimodal luminescent materials are widely used in noncontact temperature sensors and fluorescent dynamic anticounterfeiting due to their visible persistent luminescence fast optical signal response. To this end, CaY0.99GaO4: 0.01 Bi3+; CaY0.92GaO4: Bi3+, 0.07Eu3+; CaY0.96GaO4: 0.03Er3+ phosphors were prepared using the high-temperature solid-state method. The down-conversion luminescence, up-conversion long mechanical of studied, achieving multicolor luminescence. It was found that 0.07Eu3+ phosphor achieves maximum relative sensitivity 1.49% K-1. These show great potential for applications detection. Through density functional theory electron localization function analysis, multimodal CaYGaO4: Eu3+/Er3+ studied. ion doping leads a decrease band gap induces Jahn-Teller effect, creating lower energy channels accelerate carrier release enhance performance. This is fundamental reason realization human motion Subsequently, novel sensing device detection developed high performance phosphor. properties demonstrated static-dynamic applications. Finally, it stability wide defect states provide new approach sensors, detection, information storage, anticounterfeiting.

Language: Английский

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Cr³⁺/Yb³⁺ Codoped Cs₂NaInCl₆ Double Perovskites for Near-Infrared Light-Emitting Diodes

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Near-infrared (NIR) light-emitting diodes (LEDs) are potential devices that could become the core components in biological imaging, security monitoring, etc., which currently constrained by suboptimal luminous efficiency due to absence of excellent luminescent materials. Here, we report a double perovskite Cs2NaInCl6 is suitable for Cr3+ doping and exhibits broad NIR emission. Through direct absorption energy transfer (ET) from self-trapped excitons (STEs) induced matrix, can be excited 4T1(P), 4T1(F), 4T2(F) levels. Then, emission with full width at half-maximum (FWHM) ∼150 nm, spanning 800 1300 high photoluminescence quantum yield (PLQY) up 70% realized, resulting 4T2→4A2 transition Cr3+. Subsequently, introduction Yb3+ endows Cs2NaInCl6:Cr3+,Yb3+ higher PLQY 76% optimal ratio than Cs2NaInCl6:Cr3+. Ultimately, miniaturized LED device packaged based on Cs2NaInCl6:15%Cr3+,15%Yb3+ has been fabricated, demonstrates superior performance night vision, traceless perspective detection, imaging. This work not only screens out matrix but also promotes its luminescence through applications.

Language: Английский

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Ultra‐Broadband Near‐Infrared Luminescence from a Vanadium‐Activated Phosphate Glass

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(22)

Published: June 25, 2024

Abstract Broadband near‐infrared (NIR) emitting materials have gained considerable attention for their applications in lighting, displays, sensing, bio‐imaging, and optical amplification. Recently, numerous excellent broadband NIR are developed by introducing Cr 3+ , Bi + or Ni 2+ ions to various hosts. However, there is a notable absence of reports on ultra‐broadband emitters spanning the entire telecommunication window as well NIR‐I (700–1000 nm) NIR‐II (1000–1700 biological windows activated vanadium ions. Herein, study presents, first time best knowledge, emission ranging from 850 1600 nm (peaking at ≈1000 room temperature vanadium‐doped phosphate glass. Detailed spectra microscopic structure analysis reveal that two V ‐emitting centers predominantly contribute emission, corresponding 3 T 2 ( F)→ A F) spin‐allowed 1 E( D) spin‐forbidden electron transitions tetrahedrally coordinated Notably, tunability peak demonstrated adjusting local glass doping content. Moreover, glass‐converted light‐emitting diodes (gc‐LEDs) fabricated glass, potential demonstrated. The work opens new avenues design fabrication NIR‐emitting opto‐electronic devices.

Language: Английский

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Realizing Ultrabroadband NIR-II Emission and Wide-Range Wavelength Tuning in Cr⁴⁺-activated ABO₂ (A = Li, Na; B = Al, Ga) Phosphors

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(29), P. 13738 - 13747

Published: July 5, 2024

Cr

Language: Английский

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Tunable Broadband NIR-II Emission via Cr⁴⁺-Er³⁺ Energy Transfer in CaMgGeO₄:Cr⁴⁺,Er³⁺ Phosphors for Nondestructive Analysis

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(45), P. 62402 - 62410

Published: Nov. 5, 2024

Although there have been numerous reports on broadband near-infrared (NIR) emitting phosphors, their emissions are mainly concentrated in the range of 700–1000 nm (NIR-I). Herein, we successfully synthesized a phosphor CaMgGeO4:Cr4+(CMG:Cr4+) with an emission 1000–1600 (NIR-II). The introduction Er3+ ions into CMG:Cr4+ resulted wider CaMgGeO4:Cr4+,Er3+ (fwhm = 361 nm), compensating for luminescence 1500–1600 nm. More importantly, energy transfer from Cr4+ to has discovered. Furthermore, NIR pc-LED was fabricated by combining CMG:Cr4+,Er3+ 590 chip. changes intensity and profile transmission spectra light passing through different liquids reveal its potential application organic compound recognition. This work opens direction development NIR-II phosphors.

Language: Английский

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