Visible to infrared down conversion of Er3+ doped tellurite glass for luminescent solar converters

Aouaini, Fatma; Maaoui, A.; Mohamed, Naim Bel Haj; Alanazi, Meznah M.; Maati, Lamia Abu El

doi:10.1016/j.jallcom.2021.162506

Cited by 35 publications

(11 citation statements)

References 79 publications

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“…30,32,33,36 The intensity of the band at 745 cm −1 compared to the band at 664 cm −1 gives information on the number of TeO 3 units compared to TeO 4 units in the network and thus on the proportion of NBOs in the glass; the higher the band at 745 cm −1 as compared to the band at 664 cm −1 , the larger concentration of NBOs. 20,30,36,37 38 The FTIR spectra of the studied glasses are shown in Figure 1C. The spectra exhibit broad bands that can be related to OH groups.…”

Section: Resultsmentioning

confidence: 99%

“…The band located at 745 cm −1 is attributed to the symmetrical stretching of Te–O and Te = O bonds that contain non‐bridging oxygens (NBOs) in TeO 3 TP units and TeO 3+1 polyhedra 30,32,33,36 . The intensity of the band at 745 cm −1 compared to the band at 664 cm −1 gives information on the number of TeO 3 units compared to TeO 4 units in the network and thus on the proportion of NBOs in the glass; the higher the band at 745 cm −1 as compared to the band at 664 cm −1 , the larger concentration of NBOs 20,30,36,37 . Substituting Na 2 O by BaO and Bi 2 O 3 decreases the intensity of the band at 664 cm −1 compared to the main band indicating a larger amount of NBOs in these glasses.…”

Section: Resultsmentioning

confidence: 99%

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Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics

et al. 2022

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In this paper, the structural, thermal, optical, and spectroscopic properties of Er 3+ -doped tellurite glasses with the composition 68.25TeO 2 -19.5ZnO-9.75X-2.5Er 2 O 3 (in mol%) with X = BaO, Na 2 O, and Bi 2 O 3 are reported. The glasses were prepared using the standard melt quenching method. The investigated glasses exhibit low phonon energy (∼745 cm −1 ) and low glass transition temperature varying between 300 and 350 • C depending on the glass composition. The Raman spectra show a regular tellurite structure with variations in the number of bridging and non-bridging oxygens depending on the glass composition, the Na 2 O and Bi 2 O 3 -containing glasses having the most and the least polymerized network, respectively. A thermal treatment of the glasses leads to the formation of crystals, the composition of which depends on the glass composition, as revealed by X-ray diffraction analysis and confirmed using scanning electron microscope-energydispersive spectroscopy. The precipitation of Er-containing crystals in the Na 2 O and BaO-containing glasses leads to an increase in the intensity of the upconversion emissions. Although the Er 3+ ions remain in the amorphous part of the Bi 2 O 3 -containing glass after heat treatment, it is the precipitation of Bi 3.2 Te 0.8 O 6.4 crystals in this glass, which is thought to decrease the distance between the Er 3+ ions leading to an increase in the intensity of the upconversion and mid-infrared emissions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics

et al. 2022

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“…[1][2][3][4] Thus, a lot of works on luminescent rare-earth-doped tellurite glasses have been published [5][6][7][8][9] and a recent study is dedicated to development of downconversion phosphors of rare-earth-doped tellurite glasses for performance improvement of solar cells. [10] On the other hand, knowing the structural evolution of glasses is a difficult task that has sparked the interest of many researchers in the glass field. [11][12][13][14] In line with this topic, our group studied and published a detailed analysis of glassy local structure by means of Raman spectroscopy and X-ray absorption fine structure (XAFS) experiments on ternary TeO 2 -ZnO-Na 2 O (TZN)-based glasses.…”

Section: Introductionmentioning

confidence: 99%

High‐Temperature Investigation of TeO₂–Na₂O–ZnO Glasses

Clermont-Gallerande

Daiki

Colas

et al. 2022

Physica Status Solidi (b)

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Herein, a ternary system of TeO2–ZnO–Na2O (TZN) with competitive roles of covalent Zn–O and ionic Na–O bonds in tellurite glassy network is examined for high‐temperature in situ X‐ray diffraction (XRD) and Raman spectroscopy. TZN glasses are doped with Nd2O3 and the effects of Nd doping on the crystallization of glasses are also written. In situ high‐temperature XRD permits the assignment of each of the differential scanning calorimetry (DSC) crystallization peaks (the first crystallization peak (T c1) is related to sodium‐based crystalline phases, while the second crystallization peak (T c2) is correlated with tellurium‐/zinc‐based crystalline phases). The study of in situ high‐temperature Raman spectroscopy shows that T c1 shows γ‐TeO2 crystallized phase‐like peaks while T c2 crystallization has more α‐TeO2‐crystallized phase‐like peaks. Comparison at the same temperature (430 °C) permits a first understanding of the structural changes of the glasses in terms of the evolution first to α‐TeO2, ZnO, ZnTeO3, and Zn2Te3O8 crystalline phases compared with Na10Zn4O9 phase. The ZnTeO3 and Zn2Te3O8 crystallization evolution is also compared between the Nd‐doped and nondoped glasses, which gives more insight into the tellurite glass structures.

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“…An extensive number of publications on the measurement of elastic properties of glasses, by using the ultrasonic non-destructive pulse-echo technique have been achieved [7][8][9]. The impact of the above finding is clear in the international scientific attention paid to tellurite glasses and the uses of these glasses in multifunctional applications like; visible to infrared down conversion of Er 3+ doped tellurite glass for luminescent solar converters and float, borosilicate, and tellurites as cover glasses in Si photovoltaics optical properties and performances under sunlight [10][11][12][13][14].…”

Section: -Introductionmentioning

confidence: 99%

Atomic-Scale Observation of Room and Low-Temperature Ultrasonic Properties of Tellurite Glasses

El‐Mallawany

El-Moniem

Gafaar

2022

Preprint

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Theoretical analysis of room temperature bulk modulus and low-temperature ultrasonic attenuation coefficient in the glass system (1-x)TeO2-xV2O5, x = 20, 25, 30, 35, 40 mol % was achieved. The bond compression (BC) and Makishima-Mackenzie (MM) models were used to interpret room-temperature bulk modulus K. The main parameters used were: average cross-link density, number of network bonds per unit volume, and average atomic ring size (). Analyses of low-temperature (300 − 150 K) ultrasonic attenuation (α) at 2, 4, 5, and 6 MHz were achieved by calculating: potential energy, centers of energy loss, elongation, and contraction of the two-well potential. Also, the deformation potential is found to be sensitive to the variations of the modifier content. The analysis revealed a sensitive effect of variation of modifier contents for elongation or contraction of the dual-well potential. The number of centers of energy loss is related to the elastic moduli as a function of the modifier content. Correlation between room temperature bulk modulus and ultrasonic attenuation coefficient has been achieved.

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Visible to infrared down conversion of Er3+ doped tellurite glass for luminescent solar converters

Cited by 35 publications

References 79 publications

Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics

Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics

High‐Temperature Investigation of TeO₂–Na₂O–ZnO Glasses

Atomic-Scale Observation of Room and Low-Temperature Ultrasonic Properties of Tellurite Glasses

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Visible to infrared down conversion of Er3+ doped tellurite glass for luminescent solar converters

Cited by 35 publications

References 79 publications

Study of visible, NIR, and MIR spectroscopic properties of Er3+‐doped tellurite glasses and glass–ceramics

Study of visible, NIR, and MIR spectroscopic properties of Er3+‐doped tellurite glasses and glass–ceramics

High‐Temperature Investigation of TeO2–Na2O–ZnO Glasses

Atomic-Scale Observation of Room and Low-Temperature Ultrasonic Properties of Tellurite Glasses

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Product

Resources

About

Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics

Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics

High‐Temperature Investigation of TeO₂–Na₂O–ZnO Glasses