The structural and warm light emission properties of Sm3+/Tb3+ doubly doped strontium bismuth borosilicate glasses for LED applications

Rudramamba, K.S.; Taherunnisa, S.K.; Reddy, D.V. Krishna; Veeraiah, N.; Reddy, M. Rami

doi:10.1016/j.saa.2019.05.002

Cited by 33 publications

(7 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For NdVO 4 , the bands around 3.5 eV (∼27800 cm –1 ) and 2.9 eV (∼27800 cm –1 ) have been assigned to the 4 I 9/2 → 4 G 11/2 and 4 I 9/2 → 4 G 9/2 transitions. , Upon addition of Sm 3+ ( x = 0.1), a prominent absorption band emerges near 3.04 eV (24570 cm –1 ), corresponding to 6 H 5/2 → ( 6 P 4 P) 5/2 . As expected, Nd 3+ intensities gradually weaken upon increasing Sm 3+ content, while several discrete Sm 3+ bands gain in intensity: 6 H 5/2 → 4 M 7/2 at 2.93 eV (23 600 cm –1 ), 6 H 5/2 → 6 P 3/2 at 3.15 eV (25 400 cm –1 ), , 6 H 5/2 → 6 P 7/2 at 3.26 eV (26 300 cm –1 ), 6 H 5/2 → 4 D 3/2 at 3.38 eV (27 300 cm –1 ) , and 6 H 5/2 → 4 F 9/2 at 3.47 eV (27 800 cm –1 ) . Finally, the peak around 3.55 eV (28 600 cm –1 ) is assigned to 6 H 5/2 → 4 K 15/2 …”

Section: Resultssupporting

confidence: 70%

“…49,52 Upon addition of Sm 3+ (x = 0.1), a prominent absorption band emerges near 3.04 eV (24570 cm −1 ), corresponding to 6 H 5/2 → ( 6 P 4 P) 5/2 . 53 As expected, Nd 3+ intensities gradually weaken upon increasing Sm 3+ content, while several discrete Sm 3+ bands gain in intensity: 6 H 5/2 → 4 M 7/2 at 2.93 eV (23 600 cm −1 ), 54 6 H 5/2 → 6 P 3/2 at 3.15 eV (25 400 cm −1 ), 54 ). 56 Finally, the peak around 3.55 eV (28 600 cm −1 ) is assigned to 6 H 5/2 → 4 K 15/2 .…”

Section: ■ Introductionmentioning

confidence: 58%

See 1 more Smart Citation

Characterization of Flux-Grown Sm_xNd_1–xVO₄ Compounds and High-Pressure Behavior for x = 0.5

et al. 2019

View full text Add to dashboard Cite

The crystal structure and the vibrational and optical characteristics of flux-grown mixed lanthanide vanadate compounds Sm x Nd1–x VO4 (x = 0, 0.1, 0.25, 0.5, 0.75 and 1) are reported. A linear, monotonic decrease of the unit-cell parameters is observed with increasing Sm content, as expected according to the lanthanide contraction phenomenon and Vegard’s law. The evolution of Raman phonons across the series is explained by the reduction of the unit-cell size and the length of atomic bonds. UV–vis absorption spectra are found to be a weighted superposition of the absorption spectra of SmVO4 and NdVO4, while the photoluminescence of the mixed compounds is heavily quenched, which is explained by the energy transfer processes occurring between energy levels of Sm3+ and Nd3+. Finally, the influence of pressure on the structure of Sm0.5Nd0.5VO4 is reported through an X-ray diffraction study by synchrotron radiation. There is evidence of two structural phase transitions (zircon-scheelite and scheelite-fergusonite) in the pressure range up to 23.1 GPa. The zircon-scheelite-fergusonite transition is partially reversible, as a mixture of zircon and scheelite is found after pressure release. Enthalpy calculations on isostructural orthophosphates explain the appearance of a metastable monoclinic phase in the range 814 GPa. Finally, hints of a possible further phase transition to an orthorhombic structure are put in evidence by the trend of the monoclinic angle of the fergusonite polymorph.

show abstract

Section: Resultssupporting

confidence: 70%

Section: ■ Introductionmentioning

confidence: 58%

Characterization of Flux-Grown Sm_xNd_1–xVO₄ Compounds and High-Pressure Behavior for x = 0.5

et al. 2019

View full text Add to dashboard Cite

show abstract

“…This rising value of d is due to the replacement of the lower molecular weight of B 2 O 3 (69.62 g mol −1 ) with a high molecular weight of Sm 2 O 3 (348.72 g mol −1 ), resulting in the rise in the number of nonbridging oxygen (NBO) atoms. [ 31,32 ] As seen in Figure , the d of the glasses increased while their molar volume ( V m ) values decreased (29.925 to 29.319 cm 3 mol −1 ) with the rise of Sm 2 O 3 content in ANCB glasses. The decreasing trend observed in V m for Sm 3+ :ANCB glasses is due to the interstitial position occupied by Sm 3+ ions as well as the compact structure effect in the glass network.…”

Section: Resultsmentioning

confidence: 85%

Photoluminescence and X‐Ray‐Induced Luminescence Behavior of Sm₂O₃‐Doped Oxyfluoroborate Scintillating Glass for Radiation Detecting Material

Meejitpaisan

Doddoji

Kim

et al. 2022

Physica Status Solidi (a)

View full text Add to dashboard Cite

Various concentrations of samarium (Sm 3þ ) ion-activated oxyfluoroborate (ANCB: AlF 3 -NaF-CaF 2 -B 2 O 3 ) glasses are fabricated for its applications in red-emitting lasers and scintillators. From the optical absorption spectrum, Ω 2,4,6 intensity parameters and several radiative parameters along with the high value of absorption (2.96 Â 10 À21 cm 2 ) and emission (14.13 Â 10 À22 cm 2 ) cross sections are calculated. By stimulating at 403 nm, a transition corresponding to 4

show abstract

“…All these transitions are due to electric dipole interaction following the selection rules, ∆S = 0, | ∆L | ≤ 6 and | ∆J | ≤ 6. They are known as hypersensitive transitions which depend on a ligand field …”

Section: Resultsmentioning

confidence: 99%

Fabrication and optical properties of Tb³⁺‐doped NaCaPO₄ glass‐ceramics and their radiation detection applications

Chen

Gai

et al. 2020

J Am Ceram Soc

View full text Add to dashboard Cite

Tb3+‐doped 25Na2O‐23CaO‐6P2O5‐44B2O3‐2ZrO2 glass was fabricated by conventional melt‐quenching technique. Glass‐ceramics containing NaCaPO4 crystals were then obtained by heating the as‐prepared glasses. Their optical and luminescence properties were studied by FT‐IR spectroscopy, photoluminescence (PL), absorption spectra, thermoluminescence (TL), and optically stimulated luminescence in continuous wave modality (CW‐OSL). The glasses were composed of [PO4], [BO3], and [BO4] basic structural units. The PL excitation and emission spectra exhibited Tb3+‐related transitions, as well as the strongest excitation and emission wavelengths at 370 and 454 nm, respectively. We further investigated the CW‐OSL properties as a function of dopant concentration and time elapsed after irradiation (signal fading). Results indicated that the CW‐OSL intensity reached a maximum when the Tb4O7 concentration was 0.25 mol%. The fading of the OSL signal showed that the OSL signal of Tb3+‐doped NaCaPO4 glass‐ceramics was approximately 65% in 8 days, after which the intensity remained stable. The TL glow curves had a broad peak feature peaking at 180 ± 5ºC. The samples also exhibited good signal reusability and a broad linear dose‐response range (0.03‐1000 Gy). The excellent luminescent and dosimetric properties of these Tb3+‐doped NaCaPO4 glass‐ceramics indicated their potential applications in radiation dosimetry.

show abstract

The structural and warm light emission properties of Sm3+/Tb3+ doubly doped strontium bismuth borosilicate glasses for LED applications

Cited by 33 publications

References 35 publications

Characterization of Flux-Grown Sm_xNd_1–xVO₄ Compounds and High-Pressure Behavior for x = 0.5

Characterization of Flux-Grown Sm_xNd_1–xVO₄ Compounds and High-Pressure Behavior for x = 0.5

Photoluminescence and X‐Ray‐Induced Luminescence Behavior of Sm₂O₃‐Doped Oxyfluoroborate Scintillating Glass for Radiation Detecting Material

Fabrication and optical properties of Tb³⁺‐doped NaCaPO₄ glass‐ceramics and their radiation detection applications

Contact Info

Product

Resources

About

The structural and warm light emission properties of Sm3+/Tb3+ doubly doped strontium bismuth borosilicate glasses for LED applications

Cited by 33 publications

References 35 publications

Characterization of Flux-Grown SmxNd1–xVO4 Compounds and High-Pressure Behavior for x = 0.5

Characterization of Flux-Grown SmxNd1–xVO4 Compounds and High-Pressure Behavior for x = 0.5

Photoluminescence and X‐Ray‐Induced Luminescence Behavior of Sm2O3‐Doped Oxyfluoroborate Scintillating Glass for Radiation Detecting Material

Fabrication and optical properties of Tb3+‐doped NaCaPO4 glass‐ceramics and their radiation detection applications

Contact Info

Product

Resources

About

Characterization of Flux-Grown Sm_xNd_1–xVO₄ Compounds and High-Pressure Behavior for x = 0.5

Characterization of Flux-Grown Sm_xNd_1–xVO₄ Compounds and High-Pressure Behavior for x = 0.5

Photoluminescence and X‐Ray‐Induced Luminescence Behavior of Sm₂O₃‐Doped Oxyfluoroborate Scintillating Glass for Radiation Detecting Material

Fabrication and optical properties of Tb³⁺‐doped NaCaPO₄ glass‐ceramics and their radiation detection applications