Photoluminescence features of green-emitting sol-gel synthesized La2W3O12 doped with Tb3+ phosphor for PDP applications

Jeong, Hakyung; Naik, Ramachandra; Pathak, M.S.; Singh, N.; Singh, Vijay

doi:10.1016/j.ijleo.2020.165920

Cited by 9 publications

(6 citation statements)

References 26 publications

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“…The location of CIE coordinates of LAGBTb x phosphors and the standard EBU green illuminant are illustrated in Figure . The CIE coordinates of LAGBTb x phosphors are also found close to La 2 W 3 O 12 :0.05Tb 3+ (0.299, 0.568), [ 41 ] SrLaAlO 4 :0.05Tb 3+ (0.297, 0.498), [ 42 ] SrAl 2 O 4 :5.0Tb 3+ (0.296, 0.478), [ 43 ] and SrAl 2 O 4 :5.0Tb 3+ /3.0Bi 3+ (0.287, 0.607) [ 44 ] phosphors.…”

Section: Resultsmentioning

confidence: 88%

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Synthesis and Greenish‐Yellow Luminescence Properties of Li₆AlGd(BO₃)₄: Tb³⁺ Phosphors for Solid State Lighting

Netheti,

Jamalaiah,

Rasool

et al. 2023

Physica Status Solidi (a)

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The Li6AlGd(1−x)(BO3)4:xTb3+ (0 ≤ x ≤ 4.0 mol%) phosphors are fabricated via solid‐state reaction process. The structural investigations are carried out through powder X‐ray diffraction and Fourier transform infrared techniques. The morphology is examined using high‐resolution scanning electron microscope and transmission electron microscope. The temperature‐dependent luminescence properties are completed at 378 nm excitation. The photoluminescence excitation analysis is carried out by controlling the emission at 545 nm corresponding to Tb3+:5D4 → 7F5 transition. The suitable excitation wavelength is selected as 378 nm for efficient emission by studying the emission spectra at several excitation wavelengths. The emission spectra show two groups of emission bands through Tb3+:5D3 → 7FJ and Tb3+:5D4 → 7FJ transitions. The concentration‐dependent investigations reveal the optimum Tb3+ions concentration as 2.0 mol% for intense luminescence. Upon 378 nm excitation, they produce greenish‐yellow luminescence of color purity 60% with CIE color coordinates (0.286, 0.572) close to the standard European Broadcasting Union Green Illuminant and they found suitability in the design of solid‐state lighting devices.

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Section: Resultsmentioning

confidence: 88%

“…7 F 5 (545 nm) and Tb 3þ : 5 D 3 ! 7 F 4 (438 nm) LAGBTbx phosphors are also found close to La 2 W 3 O 12 : 0.05Tb 3þ (0.299, 0.568), [41] SrLaAlO 4 :0.05Tb 3þ (0.297, 0.498), [42] SrAl 2 O 4 :5.0Tb 3þ (0.296, 0.478), [43] and SrAl 2 O 4 :5.0Tb 3þ / 3.0Bi 3þ (0.287, 0.607) [44] phosphors.…”

Section: Photoluminescence Analysismentioning

confidence: 77%

Synthesis and Greenish‐Yellow Luminescence Properties of Li₆AlGd(BO₃)₄: Tb³⁺ Phosphors for Solid State Lighting

Netheti,

Jamalaiah,

Rasool

et al. 2023

Physica Status Solidi (a)

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“…Utilizing the full width at half maximum (fwhm) data (Table S2) for the most intense diffraction peak of the (111) crystal surfaces, the standard deviation of the crystal dimensions about Ag NPs was computed using the Scherrer equation (eq ). Meanwhile, the resulting mean particle size of Ag NPs is 13.33, 15.37, and 16.01 nm, correspondingly. The above-mentioned values are slightly higher than the average sphere diameter of Ag NPs as determined by TEM images.…”

Section: Resultsmentioning

confidence: 99%

Silver Nanocatalysts Supported by Multiple Melanin Carriers with a Photothermal Effect for Reduction of Methylene Blue and 4-Nitrophenol

Liu,

Deng,

Guo

et al. 2023

ACS Appl. Nano Mater.

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Although the photothermal effect can effectively enhance catalytic wastewater treatment reactions, the development of high-efficiency, low-cost, and stable catalysts with a photothermal effect still presents a challenging endeavor. Through the utilization of an in situ reduction strategy, an economical and convenient modification of small-sized silver (Ag) nanoparticles (NPs) on sepia eumelanin (SE) and artificial allomelanin (AMNP) supports was achieved, leading to the formation of Ag/SE and Ag/ AMNP nanocomposite materials. Simultaneously, Ag/AMNPs lacking nitrogen elements were employed as a control, and the contribution of nitrogen-containing groups in Ag/SE to the loading of Ag NPs was investigated. Unique SE nanospheres with high surface area exhibited excellent light absorptivity and photogenerated carrier separation efficiency as well as superior light-driven thermogenesis, which can further increase the temperature of the reaction system to accelerate the catalytic reduction of MB (5 min, 80 × 10 −2 min −1 ) and 4-NP (240 s, 14.12 × 10 −3 s −1 ). A possible mechanism for the synergistic action of photothermal catalysis is proposed. This study demonstrates that SE not only serves as an effective support for immobilized silver NPs but also functions as a photothermal conversion center, thereby enhancing catalytic reactions. This provides a promising avenue for the design of stable catalyst composites with high-performance photothermal synergistic catalysis.

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“…Therefore, increasing the luminescence intensity of rare earth tricolor phosphor to improve the luminescence performance of LEDs has become a research focus all over the world [8] . Among them, Tb 3+ ion is a common highly efficient green light activated ion, which are widely used in the preparation of green phosphors [9–11] . In order to enhance the luminous intensity of green phosphor, some sensitized ions, such as Ce 3+ , Eu 3+ and Gd 3+ , are usually doped into the phosphor containing Tb 3+ ions [12–14] .…”

Section: Introductionmentioning

confidence: 99%

“…[8] Among them, Tb 3 + ion is a common highly efficient green light activated ion, which are widely used in the preparation of green phosphors. [9][10][11] In order to enhance the luminous intensity of green phosphor, some sensitized ions, such as Ce 3 + , Eu 3 + and Gd 3 + , are usually doped into the phosphor containing Tb 3 + ions. [12][13][14] The introduction of Gd 3 + and Ce 3 + ions have a significant effect on enhancing the luminous intensity of Tb 3 + .…”

Section: Introductionmentioning

confidence: 99%

Sensitization Mechanism of Alumina Aerogels: Introducing Gd³⁺ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb³⁺

2021

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To enhance the luminous intensity of phosphors containing Tb 3 + , Gd 3 + was used as a sensitizing ion to recombine with Tb 3 + . Gd 3 + and Tb 3 + ions were loaded on the Al 2 O 3 aerogel matrix with nano porous structure via a simple and facile solgel method. After vacuum drying and calcination, Al 2 O 3 : Tb 3 + , Gd 3 + composite aerogel materials were obtained. Al 2 O 3 aerogel matrix has three-dimensional nanostructure and good chemical stability, which can provide stable crystal field and emission site for the rare earth activated ions. The results indicated that the introduction of Gd 3 + can effectively enhance the luminescence intensity of Al 2 O 3 : Tb 3 + at 543 nm under 260 nm UV excitation. The optimal ratio of Gd 3 + and Tb 3 + was determined to be 1: 1. The mechanism of Gd 3 + sensitization to Tb 3 + can be considered as electric multipole resonance transmission. We expected that this work could provide guidance for the development of enhancing the luminous intensity of green phosphors for lamp.

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Photoluminescence features of green-emitting sol-gel synthesized La2W3O12 doped with Tb3+ phosphor for PDP applications

Cited by 9 publications

References 26 publications

Synthesis and Greenish‐Yellow Luminescence Properties of Li₆AlGd(BO₃)₄: Tb³⁺ Phosphors for Solid State Lighting

Synthesis and Greenish‐Yellow Luminescence Properties of Li₆AlGd(BO₃)₄: Tb³⁺ Phosphors for Solid State Lighting

Silver Nanocatalysts Supported by Multiple Melanin Carriers with a Photothermal Effect for Reduction of Methylene Blue and 4-Nitrophenol

Sensitization Mechanism of Alumina Aerogels: Introducing Gd³⁺ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb³⁺

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Photoluminescence features of green-emitting sol-gel synthesized La2W3O12 doped with Tb3+ phosphor for PDP applications

Cited by 9 publications

References 26 publications

Synthesis and Greenish‐Yellow Luminescence Properties of Li6AlGd(BO3)4: Tb3+ Phosphors for Solid State Lighting

Synthesis and Greenish‐Yellow Luminescence Properties of Li6AlGd(BO3)4: Tb3+ Phosphors for Solid State Lighting

Silver Nanocatalysts Supported by Multiple Melanin Carriers with a Photothermal Effect for Reduction of Methylene Blue and 4-Nitrophenol

Sensitization Mechanism of Alumina Aerogels: Introducing Gd3+ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb3+

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Synthesis and Greenish‐Yellow Luminescence Properties of Li₆AlGd(BO₃)₄: Tb³⁺ Phosphors for Solid State Lighting

Synthesis and Greenish‐Yellow Luminescence Properties of Li₆AlGd(BO₃)₄: Tb³⁺ Phosphors for Solid State Lighting

Sensitization Mechanism of Alumina Aerogels: Introducing Gd³⁺ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb³⁺