Photoluminescence behavior of rare earth doped self-activated phosphors (<i>i.e.</i> niobate and vanadate) and their applications

Dwivedi, Abhishek; Roy, Abhishek; Bahadur, S.

doi:10.1039/d3ra00629h

Cited by 6 publications

(3 citation statements)

References 47 publications

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“…In the literature, there are many studies on the photoluminescence behaviors o earth-doped self-activated phosphors based on niobate crystals, and a recent revie provided by [47]. Crystalline niobate hosts, such as Ca2Nb2O7, CaNb2O6, CdN YNbO4, and LaNbO4, have been studied for applications such as self-lumin complexes, quantum-cutting luminescent solar concentrators, and for their tu properties, with very promising results according to the literature [47][48][49][50][51]. On glas the best of our knowledge, only [25] reported the occurrence of an energy transfer p from the niobate to lanthanide ions in a 24La2O3-10Nb2O5-65B2O3:1Eu2O3 glass.…”

Section: Rare Earth-doped Self-activated Glass Phosphormentioning

confidence: 99%

“…In the literature, there are many studies on the photoluminescence behaviors of rare earth-doped self-activated phosphors based on niobate crystals, and a recent review was provided by [47]. Crystalline niobate hosts, such as Ca 2 Nb 2 O 7 , CaNb 2 O 6 , CdNb 2 O 6 , YNbO 4 , and LaNbO 4 , have been studied for applications such as self-luminescent complexes, quantum-cutting luminescent solar concentrators, and for their tunable properties, with very promising results according to the literature [47][48][49][50][51]. On glasses, to the best of our knowledge, only [25] reported the occurrence of an energy transfer process from the niobate to lanthanide ions in a 24La 2 O 3 -10Nb 2 O 5 -65B 2 O 3 :1Eu 2 O 3 glass.…”

Section: Rare Earth-doped Self-activated Glass Phosphormentioning

confidence: 99%

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Photoluminescence Study of Undoped and Eu-Doped Alkali-Niobate Aluminosilicate Glasses and Glass-Ceramics

Cicconi,

Deng,

Otsuka

et al. 2024

Materials

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In this study, the photoluminescence (PL) behavior of two aluminosilicate glass series containing alkali-niobates ranging from 0.4 to 20 mol% was investigated. The glasses exhibit an intense visible emission centered at ~18,400 cm−1 for the peralkaline series and at higher energies (~19,300 cm−1) for the metaluminous glasses. However, the photoluminescence emission intensity varies significantly with the niobate content and the bulk chemistry. PL and fluorescence lifetime measurements indicate that the broad emission bands result from the overlap of different niobate populations, whose distribution changes with niobate content. The distinct PL behavior in the two glass series was related to the structural evolution of the niobate units upon niobium addition. An enhancement of the visible emission was observed for a higher fraction of distorted [NbO6] units. Eu-doping was carried out as a structural probe of the glass network, and also to determine if these glasses could be used as potential rare earth element (REE) activators. The crystal field strength around Eu ions is strongly dependent on the bulk chemistry and the niobate content. Furthermore, the peralkaline series showed energy transfer from the host [NbO6] to Eu3+, confirming the feasibility of exploring niobate glasses and glass-ceramics as lanthanide ion-activated luminescent materials. In addition, glass-ceramics (GCs) containing alkali-niobate phases with a perovskite-like structure were developed and studied to verify the optical performance of these materials. It was verified that the bulk chemistry influences crystallization behavior, and also the photoluminescence response. The transparent GC from the metaluminous series exhibits a quenching of the Eu3+ emission, whereas an enhanced emission intensity is observed for the peralkaline GC. The latter shows a strong excitation-dependent PL emission, suggesting energy transfer and migration of electronic excitation from one Eu population to another. Additionally, Eu3+ emissions arising from the D15 and D25 excited states were observed, highlighting the low phonon energy achievable in niobo-aluminosilicate hosts.

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Section: Rare Earth-doped Self-activated Glass Phosphormentioning

confidence: 99%

Section: Rare Earth-doped Self-activated Glass Phosphormentioning

confidence: 99%

Photoluminescence Study of Undoped and Eu-Doped Alkali-Niobate Aluminosilicate Glasses and Glass-Ceramics

Cicconi,

Deng,

Otsuka

et al. 2024

Materials

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“…Thus, this article considers the incorporation of nanocrystals in a glass following these previous works, but with the approach of previous mix the nanocrystals with the glass as a powder instead of adding them in the liquid glass. It's described the preparation and characterization of composite-glasses obtained by the incorporation of crystalline Eu 3+ -doped lanthanum niobate nanoparticles (LaNbO 4 :Eu 3+ ) [15][16][17][18] in tellurite glasses of TeO 2 -GeO 2 -Nb 2 O 5 -K 2 O-Li 2 O system. This system was selected because, among other characteristics, it has low softening temperature and high thermal stability against crystallization.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of as-Prepared Eu3+-doped Lanthanum Niobate Nanoparticles in Tellurite Glasses

Batista,

Mendoza,

Cassanjes

et al. 2023

Mat. Res.

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A direct-doping method was tested to design new composite-glasses by incorporating lanthanum niobate nanocrystals (NC) in tellurite glasses. NC powder were grinding with glass powder before heating-quenching, with the main investigation approached of best parameters for NC suitable homogenization but limited dissolution. Thermal analysis signalizes that prior heat-treatment of NC promotes higher transparency and limits NC dissolution. These materials with visually detectable NC aggregates exhibited glass transition temperatures close to the starting glass. LaNbO 4 phase was hardly detected by X-ray diffraction because of the low weight ratio and partial dissolution but the monoclinic polymorph could be identified for lower time. UV-visible-NIR transmission spectra also related progressive lower transparency with light scattering of NC aggregates. Photoluminescence suggest that lower times allowed to ensure the NC environment with lower crystallinity around Eu 3+ -ions in final composite-glass. These results pave the way for designing new materials containing NC not achievable by conventional nucleation-growth methods.

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Exploring the potential of Sm3+-doped Sr2B2O5 phosphors for bridging the amber gap in w-LED application

Charak,

Manhas,

Bedyal

et al. 2024

Displays

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Photoluminescence behavior of rare earth doped self-activated phosphors (i.e. niobate and vanadate) and their applications

Abstract: Rare earth doped self-activated phosphors show multimodal behavior applicable in color tunability, spectral converters and security ink.

Cited by 6 publications

References 47 publications

Photoluminescence Study of Undoped and Eu-Doped Alkali-Niobate Aluminosilicate Glasses and Glass-Ceramics

Photoluminescence Study of Undoped and Eu-Doped Alkali-Niobate Aluminosilicate Glasses and Glass-Ceramics

Incorporation of as-Prepared Eu3+-doped Lanthanum Niobate Nanoparticles in Tellurite Glasses

Exploring the potential of Sm3+-doped Sr2B2O5 phosphors for bridging the amber gap in w-LED application

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