Cr³⁺‐Yb³⁺‐Ni²⁺ Tri‐Doped NIR Phosphors with Spectral Output Covering NIR‐I and NIR‐II Regions

Advanced Materials Technologies, Год журнала: 2023, Номер 9(2)

Опубликована: Ноя. 29, 2023

Abstract To realize efficient and broadband near infrared (NIR) light in both NIR‐I NIR‐II regions, Gd 3 Mg 0.5 Al 1.5 Ga 2.5 Ge O 12 (GMAGG): Cr 3+ , Yb Ni 2+ phosphors are prepared this study. The effects of ‐Yb co‐doping ‐Ni tri‐doping on the luminescence properties investigated. GMAGG: exhibits high internal quantum efficiency (IQE) 96.4%, near‐zero thermal quenching (96.5%@423 K) 650–1100 nm. By constructing energy transfer from to emission range is further extended 650–1700 nm with a IQE 28% good stability (66%@423 K). NIR LEDs 0.04Cr 0.008Yb 0.04Ni exhibit 57.5 8.1 mW at an input current 100 mA, respectively. results show that promising phosphor for sources.

Язык: Английский

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Hydrofluoric Acid-Free Broadband Near-Infrared Phosphors K₂LiMF₆:Cr³⁺ with Zero-Thermal Quenching: Structure, Luminescence, and Application

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(36), С. 47912 - 47922

Опубликована: Авг. 29, 2024

Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) are considered promising light sources for night vision, food analysis, biomedicine, and plant growth. Yet, the application potential of this technology is vulnerable to function degradation phosphors used, such as thermal quenching, which needs be addressed urgently. Herein, NIR K2LiMF6:Cr3+ (M = Al, Ga, In) with a cubic double-perovskite structure synthesized by green hydrofluoric acid-free hydrothermal method exhibit outstanding stability. Under 450 nm excitation, as-synthesized all exhibited broadband emission covering 650–1000 peaking at 755–780 nm. The prepared K2LiAlF6:Cr3+ phosphor shows unique zero-thermal quenching performance (I423 K/I298 K 102%). comprehensive effects wide band gap, large energy barrier, weak electron–phonon coupling effect, high structural rigidity responsible suppression in material. output power pc-LED device reached 285 mW 100 mA. This series has promise vision bioimaging applications.

Язык: Английский

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A Cr3+-triggered near-infrared tungstate phosphor for organic compound non-destructive detection

Ceramics International, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 1, 2024

Язык: Английский

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Broadband emitting Fe³⁺‐doped double perovskite‐type antimonates phosphors for NIR spectroscopy applications

Journal of the American Ceramic Society, Год журнала: 2023, Номер 107(4), С. 2371 - 2383

Опубликована: Ноя. 20, 2023

Abstract Near‐infrared (NIR) broadband emitting phosphors regarded as ideal miniaturized NIR light sources, have recently received considerable attention. Nevertheless, the lack of appropriate substitutes for poisonous Cr 3+ still poses a significant obstacle. Here, by selecting double perovskite‐type antimonates compound Ca 2 LuSbO 6 (CLSO) and YSbO (CYSO) hosts, NIR‐emitting CLSO: 0.008Fe CYSO: 0.01Fe are firstly reported. The above materials exhibit rare long‐wavelength emission band peaking at 927 938 nm, respectively. Accordingly, their full widths half maximum 128 135 Moreover, mechanism concentration quenching thermal effect discussed. IQEs is measured to be 69%, which superior many available Fe‐activated phosphors. Integrating bond valence theory analysis with electron paramagnetic resonance measurement, Fe only lattice site Sb atom generate [FeO ] octahedron accompanying distortion. Significantly, as‐fabricated phosphor‐converted diodes device shows substantial applications in night vision spectroscopy detection. This work contributes novel insights into photoluminescence occupancy , thereby paving new avenue exploring next‐generation environmentally‐friendly nontoxic light‐emitting materials.

Язык: Английский

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Multifunctional near-infrared long persistent luminescence phosphor BaLu2Al2Ga2SiO12:Cr3+, Tb3+ with good thermal stability, promising quantum efficiency, and excellent environmental resistance

Chemical Engineering Journal, Год журнала: 2023, Номер 481, С. 148071 - 148071

Опубликована: Дек. 13, 2023

Язык: Английский

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