Luminescence in Er3+ co-doped bismuth germinate glass–ceramics for blue and green emitting applications

Kashif, I.; Ratep, A.

doi:10.1007/s43207-022-00281-2

Cited by 11 publications

(4 citation statements)

References 65 publications

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“…This displays that the site asymmetry around Er +3 ions is very high. The hypersensitive transition oscillator strength of 4 I15/2 to 2 H11/2 for the prepared glasses are higher those reported in [40,43,52,54,55]. The small value of ∆RMS means a perfect curve fitting among of fexp and fcal value.…”

Section: Judd-offelt Analysismentioning

confidence: 60%

“…The value of χ lies in the range between 0.781 and 0.983 whereby 1 mole% of Er +3 for TPBE glass demonstrate maximum value of 0.983, indicating that the TPBE2 can be more promising laser material. The value of χ for the sample TPBE2 is larger than those reported in [52,54,[59][60][61][62][63][64][65] and smaller than those reported in [41,[66][67][68]. The values of intensity parameters Ω=2,3 and 6 and spectroscopic quality factor for Er +3 doped lead bismuth tellurite glasses compared with literature are listed in Table 6.…”

Section: Judd-offelt Analysismentioning

confidence: 82%

“…𝜋𝑁𝑒 2 ∫ 𝜀(𝑣)𝑑𝑣 = 4.318 𝑥 10 −9 ∫ 𝜀(𝑣)𝑑𝑣 [23] where m, e, c, N and v represent mass and charge of electron, velocity of light in vacuum, Avogadro's number and molar absorptivity, respectively. The calculated oscillator strength for electric and magnetic dipole transitions from the ground state |(S, L)J> to the excited state |(S′,L′)J′> for Er +3 ions between 4f-4f states have been calculated [52].…”

Section: Judd-offelt Analysismentioning

confidence: 99%

“…In order to compare experimental and calculated oscillator strengths, a least square fitting method used to calculate Judd-Ofelt parameters. The root mean square (∆RMS) deviation is given by [52]:…”

Section: Judd-offelt Analysismentioning

confidence: 99%

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Spectroscopic Characteristics and Radiative Parameters of Er+3 Doped Ternary Lead Bismuth Tellurite Glass: Judd-Ofelt Analysis

Ahmed,

Mawlud

2023

Preprint

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Er+ 3doped lead-bismuth tellurite glasses with the composition (75-x) TeO2 − 15 PbO – 10 Bi2O3 - xEr2O3 where (x = 0, 0.5, 1, 1.5, 2 and 2.5 mole%) were synthesized by using melt quenching technique. The influence of Er3+ doping was evaluated through physical and optical properties. The non-crystalline nature of the samples was analyzed by XRD. The density of the samples was increased from 6.387 to 6.528 g.cm− 3. The absorption spectra show eight transition bands corresponding to the transitions from 4I15/2 to 4I13/2, 4I11/2, 4I9/2, 4F9/2, 4S3/2, 4H11/2, 4F7/2 and 4F5/2, respectively. The experimental and calculated oscillator strengths were calculated based on the Judd-Ofelt theory. The intensity parameters follow the trend Ω2 > Ω6 > Ω4. Three emission bands were observed from the fluorescence spectra. The green transition 4S3/2 →4I15/2 is the strongest among other transitions. The color coordinates were determined by using CIE 1931 chromaticity diagram. The highest quantum efficiency was 95.11% for the transition 4S3/2 →4I15/2. The results suggest that the TPBE2 glass is a great promising candidate for photonic applications and fabrication of laser optical devices.

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Section: Judd-offelt Analysismentioning

confidence: 60%

Section: Judd-offelt Analysismentioning

confidence: 82%

Section: Judd-offelt Analysismentioning

confidence: 99%

Section: Judd-offelt Analysismentioning

confidence: 99%

See 2 more Smart Citations

Spectroscopic Characteristics and Radiative Parameters of Er+3 Doped Ternary Lead Bismuth Tellurite Glass: Judd-Ofelt Analysis

Ahmed,

Mawlud

2023

Preprint

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Optical properties of borate glasses containing chromium and erbium oxide

Kashif

Ratep

2023

Appl. Phys. A

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Borate glass samples containing chromium and erbium were prepared. According to the density and molar volume, the Cr2O3-free glass sample had an expanded glass structure. Cr has three distinct absorption bands, and according to the measured optical absorption characteristics, a band was observed at 688 nm due to the 4A2g(F) → 2Eg(G) transition, indicating the presence of Cr6+. Cr3+ was observed in the bands at 446 and 620 nm, which were attributed to 4A2g (F) → 4T2g (F) and 4A2g (F) → 4T1g (F). Using the absorption spectra of the glass samples, the Judd–Ofelt theory was used to calculate the three parameters for glass: Ω2, Ω4, and Ω6. The slow transformation of chromium ions in these glasses from Cr6+ to Cr3+ disturbs the local symmetry and adds coordinated bond defects, which affect the surroundings of Er3+ ions.

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Effect of samarium oxide addition on the structural, thermal, and optical properties and photoluminescence of lithium borate glass

Al-Refaey,

El-Maboud,

Abdelghany

et al. 2024

J Mater Sci: Mater Electron

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The samples were prepared in compliance with the form 33 Li2O–66 B2O3—(1-x) AgF—x Sm2O3, where x = 0, 0.25, 0.5, and 0.75. Powdered samples were converted to a glassy state via melting and quenching. The glassiness of the prepared samples was examined using X-ray diffraction (XRD) and Differential Thermal Analysis (DTA). From the absorption spectra of the prepared glass samples, the band gap in the optical spectrum changed slightly in the range of 3.45, whereas the Urbach energy decreased from 0.32 to 0.267 eV. The fluctuations of the optical band gap and Urbach energy can be attributed to variations in the glass structure. Sm3 + emitted intense reddish-orange light under blue and UV light excitation. There are six excitation bands in the Sm3+ excitation spectrum situated in the blue and UV regions, peaking at 361.7, 374, 400, 417, 462, and 475 nm, which are attributed to the transitions from 6H5/2 to 4D3/2, 6P7/2, 6P3/2, 6P5/2, 4I13/2, and 4I11/2 respectively. The transition from 6H5/2 to 6P3/2 had the highest intensity and was associated with a peak at 400 nm. The bright yellow, reddish-orange, and red emission bands of the Sm3+ ions in the oxide glasses are related to the 4G5/2 → 6H5/2, 4G5/2 → 6H7/2, and 4G5/2 → 6H9/2 emission transitions, respectively.

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Luminescence in Er3+ co-doped bismuth germinate glass–ceramics for blue and green emitting applications

Cited by 11 publications

References 65 publications

Spectroscopic Characteristics and Radiative Parameters of Er+3 Doped Ternary Lead Bismuth Tellurite Glass: Judd-Ofelt Analysis

Spectroscopic Characteristics and Radiative Parameters of Er+3 Doped Ternary Lead Bismuth Tellurite Glass: Judd-Ofelt Analysis

Optical properties of borate glasses containing chromium and erbium oxide

Effect of samarium oxide addition on the structural, thermal, and optical properties and photoluminescence of lithium borate glass

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