Structural and photoluminescence properties of Cr3+ doped LaVO4 phosphor

Rai, Ekta; Yadav, Ram Sagar; Kumar, Dinesh; Singh, Akhilesh Kumar; Bahadur, S.

doi:10.1016/j.solidstatesciences.2022.106904

Cited by 13 publications

(22 citation statements)

References 52 publications

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“…This implies that all Eu 3+ and Cr 3+ co-doped LaVO 4 phosphors crystallize into monoclinic crystal structure belonging to P 2 1 / n space group. 32–34 No traces of any secondary phase in the XRD profile of these compounds are seen. The XRD patterns shift towards higher 2 θ value with the increase of concentration of Cr 3+ ion.…”

Section: Resultsmentioning

confidence: 93%

“…The charge transfer transition (CTS) of O 2− → Eu 3+ also lies in 270–325 nm range and overlaps on (VO 4 ) 3- bands. 17–19,32–34…”

Section: Resultsmentioning

confidence: 99%

“…12b) and they are assigned to arise due to 4 T 1 ( 4 P) → 4 A 2 , 4 T 2 ( 4 P) → 4 A 2 and 2 E → 4 A 2 transitions of Cr 3+ ion, respectively. 34,38…”

Section: Resultsmentioning

confidence: 99%

“…The XRD measurements clearly show that the phosphor samples exist in monoclinic phase at this temperature. 25,27,28,32–34…”

Section: Introductionmentioning

confidence: 99%

“…This induced us to select this as a host matrix. [32][33][34] LaVO 4 exists in monoclinic (m-LaVO 4 ) as well as in tetragonal (t-LaVO 4 ) phases. The formation of monoclinic or tetragonal phase depends on the temperature used for its preparation and also on the environment in which the samples have been prepared (in air or vacuum).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Cr³⁺ doping on structural and optical properties of Eu³⁺ doped LaVO₄ phosphor

et al. 2023

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Section: Resultsmentioning

confidence: 93%

“…The charge transfer transition (CTS) of O 2− → Eu 3+ also lies in 270–325 nm range and overlaps on (VO 4 ) 3- bands. 17–19,32–34…”

Section: Resultsmentioning

confidence: 99%

“…12b) and they are assigned to arise due to 4 T 1 ( 4 P) → 4 A 2 , 4 T 2 ( 4 P) → 4 A 2 and 2 E → 4 A 2 transitions of Cr 3+ ion, respectively. 34,38…”

Section: Resultsmentioning

confidence: 99%

“…The XRD measurements clearly show that the phosphor samples exist in monoclinic phase at this temperature. 25,27,28,32–34…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Cr³⁺ doping on structural and optical properties of Eu³⁺ doped LaVO₄ phosphor

et al. 2023

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Thermally stable Sm³⁺‐doped alkali zinc alumino borosilicate (AZABS) glass for warm white light generation and w‐LED applications

et al. 2023

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Samarium ion (Sm3+)‐doped alkali zinc alumino borosilicate (AZABS) glass was synthesized via quick melt quench technique. Various spectroscopic studies like optical absorption, photoluminescence (PL) emission, PL excitation, temperature‐dependent PL and PL decay kinetics were performed on the as prepared glass system. Under 402 nm excitation, three sharp bands at wavelengths 563, 599 and 645 nm corresponding to transitions 4G5/2 → 6H5/2, 6H7/2 and 6H9/2, respectively, can be seen in the PL emission spectra. The 0.25 mol% Sm3+ glass has the highest intensity for these emissions. The lanthanide interaction in the glass matrix is dipole–dipole in nature as was proven from Dexter's analysis. The direct bandgap of 0.25 mol% Sm3+‐doped AZABS glass was calculated to be 2.88 eV. The lifetimes of the as prepared glass range from 1.93 ms for the lowest concentration of Sm3+ to 0.75 ms for the highest. From temperature dependent PL studies, the activation energy for 0.25 mol% Sm3+‐doped AZABS glass was found to be 0.19 eV which shows high thermal stability of this glass. We propose to utilize these Sm3+‐doped AZABS glasses for white‐light emitting diodes (w‐LEDs) and solid‐state lighting (SSL) applications.

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Unraveling the Remarkable Influence of Square Antiprism Geometry on Highly Efficient Far‐Red Emission of Eu³⁺ in Borotellurate Phosphors for Versatile Utilizations

Li,

Niu,

Liu

et al. 2024

Laser & Photonics Reviews

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Eu3+‐activated red‐emitting inorganic phosphors have been favored highly for their classical 5D0→7FJ (J = 0, 1, 2, 3, 4) emissions. However, the fatal drawbacks of poor luminous efficacy and weak 5D0→7F4 transition persist, resulting in the ongoing challenge of achieving far‐red emission. This research reports series of highly efficient far‐red phosphors LnTeBO5 (Ln = La3+, Y3+, Gd3+):Eu3+ with anomalously strong 5D0→7F4 transition, resulting from the distorted square antiprism [Ln/EuO8]. Both the luminous efficacy and thermal stability can be greatly enhanced via the simple composition variation. [Ln/EuO8] square antiprism‐triggered 5D0→7F2,4 transitions are elucidated in depth, acquiring ultra‐high luminous efficacy (IQE = 95%, EQE = 40%, and AE = 42%) and near‐zero thermal quenching (99%@150°C and 98%@200°C). Subsequently, the versatile utilizations in indoor lighting, plant growth lighting, and security ink are illustrated. This finding establishes a deep understanding for constructing high‐quality far‐red phosphors via the Eu3+‐centered structural units of square antiprism.

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Structural and photoluminescence properties of Cr3+ doped LaVO4 phosphor

Cited by 13 publications

References 52 publications

Effect of Cr³⁺ doping on structural and optical properties of Eu³⁺ doped LaVO₄ phosphor

Effect of Cr³⁺ doping on structural and optical properties of Eu³⁺ doped LaVO₄ phosphor

Thermally stable Sm³⁺‐doped alkali zinc alumino borosilicate (AZABS) glass for warm white light generation and w‐LED applications

Unraveling the Remarkable Influence of Square Antiprism Geometry on Highly Efficient Far‐Red Emission of Eu³⁺ in Borotellurate Phosphors for Versatile Utilizations

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Structural and photoluminescence properties of Cr3+ doped LaVO4 phosphor

Cited by 13 publications

References 52 publications

Effect of Cr3+ doping on structural and optical properties of Eu3+ doped LaVO4 phosphor

Effect of Cr3+ doping on structural and optical properties of Eu3+ doped LaVO4 phosphor

Thermally stable Sm3+‐doped alkali zinc alumino borosilicate (AZABS) glass for warm white light generation and w‐LED applications

Unraveling the Remarkable Influence of Square Antiprism Geometry on Highly Efficient Far‐Red Emission of Eu3+ in Borotellurate Phosphors for Versatile Utilizations

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Product

Resources

About

Effect of Cr³⁺ doping on structural and optical properties of Eu³⁺ doped LaVO₄ phosphor

Effect of Cr³⁺ doping on structural and optical properties of Eu³⁺ doped LaVO₄ phosphor

Thermally stable Sm³⁺‐doped alkali zinc alumino borosilicate (AZABS) glass for warm white light generation and w‐LED applications

Unraveling the Remarkable Influence of Square Antiprism Geometry on Highly Efficient Far‐Red Emission of Eu³⁺ in Borotellurate Phosphors for Versatile Utilizations