Peak stimulated emission cross sections and quantum efficiencies of Sm3+ and Sm3+-Eu3+ co-doped bismuth boro-tellurite glasses

Mallur, Saisudha; Khoo, Ting Chean; Rijal, Suman; Huff, Owen; Babu, P.

doi:10.1016/j.matchemphys.2020.123886

Cited by 24 publications

(7 citation statements)

References 47 publications

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“…24,50 The asymmetric ratio, I R (= 5 D 0 → 7 F 2 [ED]/ 5 D 0 → 7 F 1 [MD]), measures the degree of structural distortion of local symmetry and the covalent nature of Eu-O. 56,57 For the present Eu 3+ -doped glass system, the asymmetry ratio (I R ) of 2.43 (>1) was determined, suggesting that Eu 3+ ions are preferentially located at sites without inversion symmetry.…”

Section: Resultsmentioning

confidence: 99%

“…In the present KZnBP glass matrix, the 5 D 0 → 7 F 2 transition at 617 nm is dominant, suggesting that Eu 3+ is located at a non‐inversion‐symmetric site in the KZnBP glass 24,50 . The asymmetric ratio, I R (= 5 D 0 → 7 F 2 [ED]/ 5 D 0 → 7 F 1 [MD]), measures the degree of structural distortion of local symmetry and the covalent nature of Eu–O 56,57 . For the present Eu 3+ ‐doped glass system, the asymmetry ratio ( I R ) of 2.43 (>1) was determined, suggesting that Eu 3+ ions are preferentially located at sites without inversion symmetry.…”

Section: Resultsmentioning

confidence: 99%

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Excitation‐dependent energy transfer and color tunability in Dy³⁺/Eu³⁺ co‐doped multi‐component borophosphate glasses

et al. 2023

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Using the melt‐quench technique, potassium zinc borophosphate (KZnBP) glasses incorporated with Dy3+, Eu3+, and Dy3+/Eu3+ ions individually and combinedly were prepared, and their photoluminescence (PL)‐related features were investigated. The KZnBP glass containing an optimized content of Dy3+ (0.5 mol%) is co‐doped with Eu3+ in various contents, and the energy transfer (ET) process between them was studied at λexci = 349, 364, 387 (Dy3+), and 394 nm (Eu3+). The Dy3+/Eu3+ co‐doped system, when excited with Dy3+ excitations has resulted in a significant decrease in the intensity of Dy3+ peaks observed at 480 nm (4F9/2→6H15/2, blue) and 574 nm (4F9/2→6H13/2, yellow), with simultaneous enhancement of the intensity of Eu3+ peaks at 591 nm (5D0→7F1, orange) and 617 nm (5D0→7F2, red). This trend is due to the efficient energy transfer from Dy3+ to Eu3+, indicating that Eu3+ ions were sensitized by Dy3+ ions. Dexter's theory and the Inokuti–Hirayama (I–H) model revealed that the dipole–dipole interaction is accountable for the energy transfer from Dy3+ to Eu3+ through energy‐transfer channels [4F9/2(Dy3+)+7F1,2(Eu3+)→6H15/2(Dy3+)+5D2(Eu3+)] and [4F9/2(Dy3+)+7F0(Eu3+)→6H13/2(Dy3+)+5D0(Eu3+)]. The color coordinates of the Dy3+/Eu3+ co‐doped glasses under various excitations fall within the white light emission spectrum, indicating their potential application in warm white LEDs.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Excitation‐dependent energy transfer and color tunability in Dy³⁺/Eu³⁺ co‐doped multi‐component borophosphate glasses

et al. 2023

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“…The peaks in the band region 400-500 cm À1 resulting from the Pb + and Sm + metal ions vibrations in the glass matrix [25,26] were also enhanced. New small peaks at 2850.4 and 2921 cm À1 were visible, but these were assigned to hydrogen bonding due to the lead oxide [25,27].…”

Section: Ftir Analysismentioning

confidence: 99%

“…When incorporated into a suitable host glass network, samarium provides good luminescence in the visible region [7,9]. The emission of the Sm 3+ ions is not influenced by the high phonon energy, which is why borate glass are widely used in doping with samarium [10,12,13,[23][24][25][26][27][28][29][30].…”

mentioning

confidence: 99%

Structural, photoluminescence, and optical characteristics of a Sm³⁺‐doped lead borate–strontium–tungsten glass system: Evaluation of Judd–Ofelt intensity parameters and radiative properties

Kotb,

Okasha,

Zidan

et al. 2024

Luminescence

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In this study, the melt quenching approach is used to synthesize a lead borate–strontium‐based glass system doped with samarium ions. Modifications in the glass network structure arising from the addition of various concentrations of Sm3+ ions were investigated via Fourier transform infrared (FTIR) spectroscopy. FTIR analysis revealed B–O–B bridges, BO3, and BO4 units are present. UV–vis–NIR spectroscopic measurement was performed to study the optical absorption spectra. Optical constants such as optical bandgap energies, refractive indices, and other related parameters were evaluated. The lifetime fluorescence decay was measured and ranged between 1.04 and 1.88 ns. The photoluminescence spectra in the range 500–750 nm revealed four transitions from the ground state 6G5/2 to the excited states 6H5/2, 6H7/2, 6H9/2 and 6H11/2 and J–O theory was utilized to study these optical transitions for Sm3+ ions. Calculations of the oscillator strengths and J–O intensity parameters were performed and the obtained J–O parameters followed the sequence Ω4 > Ω6 > Ω2. The ratio O/R indicated a high lattice asymmetry around the samarium ions. The values of lifetimes and branching ratios for the fabricated samples emphasized their suitability to be used in laser applications. The current glass samples are good candidates for orange and red emission devices.

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“…Another important parameter that determines the potential of this material for laser applications is the stimulated emission cross-section, δ e [67]. The value of δ e which also suggests the rate of energy extraction from the laser material, can be evaluated using the Füchtbauer-Ladenburg formula [54,68]: ´(λ)/I max dλ.…”

Section: Judd-ofelt (Jo) Intensity Parameters and The Laser Propertie...mentioning

confidence: 99%

Red-emission analysis, Judd–Ofelt intensity parameters and laser properties of CdMgZnO:xEu³⁺ nanocrystals: the effects of Eu³⁺ concentration

Kalu¹,

Ahemen²,

Ponce³

et al. 2021

J. Phys. D: Appl. Phys.

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In this paper, we discuss a strong red Eu3+-concentration-dependent emission line associated with an electric dipole transition (5D0 → 7F2) at 616 nm in CdMgZnO:xEu3+ nanocrystals made via a sol–gel synthesis route. Oxygen interstitial defects created by the presence of a mixed-valence state of Eu 3+ and Eu2+ ions as rare-earth cations lead to a structural distortion which is confirmed by x-ray photon electron spectroscopy. The Judd–Ofelt intensity parameters, Ω2 and Ω4, obtained from the emission spectra, show a trend for Ω2 > Ω4 that translates to stronger covalence and a stable local structure surrounding the Eu3+ ions in CdMgZnO nanocrystals. The asymmetry ratio (R o), radiative lifetime (), branching ratio , stimulated emission cross-section, and the gain bandwidth (δ e× Δλ eff) for 5D0 are computed and analysed. A radiative lifetime ranging from 789 to 984 µs points to a suitable material for orange-red fluorescent phosphors for lighting and display technologies. The gain bandwidth (δ e× Δλ eff), which is dependent on the Eu3+ concentration, suggests the use of the CdMgZnO:xEu3+ nanocrystal material in fibre amplifiers, while the sample with x = 1.5%, which yields the largest emission cross-section (15.79 × 10−22 cm2), the highest gain bandwidth (28.8 × 10−28 cm3), and a high branching ratio (71%), is the best candidate for red laser applications.

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Peak stimulated emission cross sections and quantum efficiencies of Sm3+ and Sm3+-Eu3+ co-doped bismuth boro-tellurite glasses

Cited by 24 publications

References 47 publications

Excitation‐dependent energy transfer and color tunability in Dy³⁺/Eu³⁺ co‐doped multi‐component borophosphate glasses

Excitation‐dependent energy transfer and color tunability in Dy³⁺/Eu³⁺ co‐doped multi‐component borophosphate glasses

Structural, photoluminescence, and optical characteristics of a Sm³⁺‐doped lead borate–strontium–tungsten glass system: Evaluation of Judd–Ofelt intensity parameters and radiative properties

Red-emission analysis, Judd–Ofelt intensity parameters and laser properties of CdMgZnO:xEu³⁺ nanocrystals: the effects of Eu³⁺ concentration

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Peak stimulated emission cross sections and quantum efficiencies of Sm3+ and Sm3+-Eu3+ co-doped bismuth boro-tellurite glasses

Cited by 24 publications

References 47 publications

Excitation‐dependent energy transfer and color tunability in Dy3+/Eu3+ co‐doped multi‐component borophosphate glasses

Excitation‐dependent energy transfer and color tunability in Dy3+/Eu3+ co‐doped multi‐component borophosphate glasses

Structural, photoluminescence, and optical characteristics of a Sm3+‐doped lead borate–strontium–tungsten glass system: Evaluation of Judd–Ofelt intensity parameters and radiative properties

Red-emission analysis, Judd–Ofelt intensity parameters and laser properties of CdMgZnO:xEu3+ nanocrystals: the effects of Eu3+ concentration

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Excitation‐dependent energy transfer and color tunability in Dy³⁺/Eu³⁺ co‐doped multi‐component borophosphate glasses

Excitation‐dependent energy transfer and color tunability in Dy³⁺/Eu³⁺ co‐doped multi‐component borophosphate glasses

Structural, photoluminescence, and optical characteristics of a Sm³⁺‐doped lead borate–strontium–tungsten glass system: Evaluation of Judd–Ofelt intensity parameters and radiative properties

Red-emission analysis, Judd–Ofelt intensity parameters and laser properties of CdMgZnO:xEu³⁺ nanocrystals: the effects of Eu³⁺ concentration