Structural and photoluminescence properties of a novel Ba2GdNbO6: Sm3+ phosphor

A novel far‐red emitting phosphor Sr2MgWO6: Mn4+ was fabricated using high‐temperature solid‐state reaction. X‐ray diffraction patterns, scanning electron microscopy images, and photoluminescence excitation and photoluminescence spectra for this phosphor were analyzed in detail. The analysis revealed that its emission ranged from 600 to 800 nm and peaked at 699 nm, which was attributed to the 2Eg→4A2g transition of Mn4+ under 314 nm excitation. Moreover, we introduced rare‐earth Yb3+ ions into the Sr2MgWO6:Mn4+ to improve its far‐red emitting intensity. The photoluminescence (PL) intensity of the Yb3+ co‐doped phosphor was three times higher than that of the single‐doped phosphor. Therefore charge compensation is an efficient approach to improving PL intensity. The phosphor emitted a far‐red light that resembled the pigments essential for plant growth in terms of the absorption spectrum. Therefore, the obtained phosphor, Sr2MgWO6:0.006Mn4+,0.2Yb3+, had the potential to be a new type of far‐red luminescent powder for indoor plant growth LEDs.

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“…Moreover, the type of interaction can be calculated by the relation between the log( I/x ) and log( x ), which was reported by Dexter [25]:

\frac{I}{x} goodbreak= K {[1 + β {((), x)}^{\frac{θ}{3}}]}^{- 1}

…”

Section: Resultsmentioning

confidence: 99%

A novel Mn⁴⁺‐activated far‐red Sr₂MgWO₆ phosphor: synthesis, luminescence enhancement, and application prospect

Cheng

Long

et al. 2023

Luminescence

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“…The $626 cm À1 absorption band corresponded to the La-O-Zr vibration. The small intensity peak at $1121 cm À1 may correspond to the basic vibration in the SLZ [15] sample. The absorption bands at 1639 and 1358 cm À1 were considered to be ZrO 2 As shown in the figure, when the sample is excited by UV light, a broadband emission peak appears at 468 nm, which is due to the presence of oxygen vacancies leading to the appearance of [ZrO 5 -VO 00 -LaO 6 ] groups [17].…”

Section: Infrared Spectroscopymentioning

confidence: 98%

Tunable warm white light emission and energy transfer of Dy³⁺ co‐doped Sr₂LaZrO_5.5:Eu³⁺ phosphors

Jia‐li,

Ting‐ting,

Xue

et al. 2023

Luminescence

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Eu3+, Dy3+ co‐doped Sr2LaZrO5.5‐based phosphors were prepared through a sol‐gel method. Through characterization, it was found that the Sr2LaZrO5.5 based fluorescent powder co doped with Eu3+and Dy3+has a cubic structure. At an excitation wavelength of 290 nm, the substrate Sr2LaZrO5.5 exhibits strong blue emission at 468 nm, and the Sr2LaZrO5.5:18 % Eu3+phosphor exhibits a strong red emission peak at 612 nm. When the doping amount of Dy3+ is (5, 8, 12, 15, 18 %), the Sr2LaZrO5.5:18 % Eu3+phosphor changes from orange red light, warm white light, and cold white light. According to the emission spectra, the emission intensities of the substrates Sr2LaZrO5.5 and Sr2LaZrO5.5: Eu3+ decrease with increasing Dy3+ concentration, confirming the energy transfer between the host Sr2LaZrO5.5‐Eu3+‐Dy3+, resulting in a lower CCT value, significantly improved white light emission.

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“…Nowadays near-ultraviolet (n-UV)/blue light-emitting diodes (LEDs) have become increasingly popular because of their many benefits over other solid-state lighting sources, including their long lifespan, stability, high efficiency, and environmental friendliness [1][2][3][4]. Commercial LED technology was first introduced in 1960, and with the 1997 release * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Spectral studies of thermally stable Dy³⁺/Sm³⁺ co-doped Li₂Ba₅W₃O₁₅ phosphors for warm white LEDs

Anu,

Kumari,

Deopa

et al. 2024

J. Phys. D: Appl. Phys.

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In the current study, a series of Li2Ba5W3O15: RE3+ (RE=Dy, Sm) [LBW:Dy3+/Sm3+] phosphors were prepared using a high-temperature solid-state method. X-ray diffraction (XRD), Scanning electron microscopy (SEM) with Energy-dispersive X-ray analysis (EDX) scans showed that the crystal form was consistent with the standard LBW and comprised small irregularly shaped particles. Diffuse reflectance spectral (DRS) data was utilized to calculate the band gaps. Fluorescence study shows that LBW material doped with Dy3+ and Sm3+ yield distinct colors at 496 nm (blue) for Dy3+ and 582 nm (green-yellow), 612 nm (yellow), and 669 nm (red) for Sm3+ when excited by near-ultraviolet (n-UV) (336 nm) light. The observation of energy transfer (ET) between Dy3+ and Sm3+ ions play a role in modifying the luminescence of LBW:Dy3+/Sm3+ co-doped phosphors. With a constant excitation wavelength (λEx), different levels of activator doping lead to a change in the emission colors from their neutral white light to a deep orange-red region for LBW:Dy3+/Sm3+ phosphors. The decay curves demonstrate a decrease in lifetime with an increase in the concentration of activator ions (Sm3+). For D3S5 phosphor, the temperature-dependent photoluminescence (TDPL) characteristics were analysed under λEx = 336 nm excitation. The results indicate excellent luminescence thermal stability with an activation energy of 0.16 eV at λEx = 336 nm. With its low color-correlated temperature (CCT) and good thermal stability, the prepared phosphor sample shows potential as a solid-state emitting phosphor that can be used with UV chip stimulation for warm white LED applications.

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Structural and photoluminescence properties of a novel Ba2GdNbO6: Sm3+ phosphor

Cited by 17 publications

References 34 publications

A novel Mn⁴⁺‐activated far‐red Sr₂MgWO₆ phosphor: synthesis, luminescence enhancement, and application prospect

A novel Mn⁴⁺‐activated far‐red Sr₂MgWO₆ phosphor: synthesis, luminescence enhancement, and application prospect

Tunable warm white light emission and energy transfer of Dy³⁺ co‐doped Sr₂LaZrO_5.5:Eu³⁺ phosphors

Spectral studies of thermally stable Dy³⁺/Sm³⁺ co-doped Li₂Ba₅W₃O₁₅ phosphors for warm white LEDs

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Structural and photoluminescence properties of a novel Ba2GdNbO6: Sm3+ phosphor

Cited by 17 publications

References 34 publications

A novel Mn4+‐activated far‐red Sr2MgWO6 phosphor: synthesis, luminescence enhancement, and application prospect

A novel Mn4+‐activated far‐red Sr2MgWO6 phosphor: synthesis, luminescence enhancement, and application prospect

Tunable warm white light emission and energy transfer of Dy3+ co‐doped Sr2LaZrO5.5:Eu3+ phosphors

Spectral studies of thermally stable Dy3+/Sm3+ co-doped Li2Ba5W3O15 phosphors for warm white LEDs

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A novel Mn⁴⁺‐activated far‐red Sr₂MgWO₆ phosphor: synthesis, luminescence enhancement, and application prospect

A novel Mn⁴⁺‐activated far‐red Sr₂MgWO₆ phosphor: synthesis, luminescence enhancement, and application prospect

Tunable warm white light emission and energy transfer of Dy³⁺ co‐doped Sr₂LaZrO_5.5:Eu³⁺ phosphors

Spectral studies of thermally stable Dy³⁺/Sm³⁺ co-doped Li₂Ba₅W₃O₁₅ phosphors for warm white LEDs