Luminescence and upconversion processes in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0041.gif" overflow="scroll"><mml:msup><mml:mrow><mml:mi>Er</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:math>-doped tellurite glasses

Gonçalves, Anderson; Zanuto, Vitor Santaella; Flizikowski, G.A.S.; Medina, A. N.; Hegeto, Fábio Luís; Somer, Aloisi; Gomes, João Luis; Gunha, Jaqueline Valeski; Cruz, Gerson Kniphoff da; Jacinto, Carlos; Astrath, N. G. C.; Novatski, Andressa

doi:10.1016/j.jlumin.2018.04.031

Cited by 25 publications

(3 citation statements)

References 40 publications

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“…Recently, tellurite glasses have received considerable attention for their potential application as promising materials used for optical devices [1][2][3][4][5]. Tellurite glasses are characterized by good chemical durability, high luminescence intensity, low glass transition, good chemical resistance and high linear and nonlinear refractive index [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Influence of barium oxide on glass-forming ability and glass stability of the tellurite–phosphate oxide glasses

Leśniak

Szal

Starzyk

et al. 2019

J Therm Anal Calorim

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The effect of BaO content on the glass-forming ability, glass stability and structure of tellurite-phosphate oxide glasses in the 70TeO 2-10P 2 O 5-(20-x)ZnO-xBaO (x = 0, 5 and 10 mol%) system has been discussed. From the differential scanning calorimetry, the glass transition (Tg), crystallization (Tc) and the melting (Tm) temperatures were estimated. The decrease in reduced glass transition temperature (Tr g) and glass-forming tendency parameter (K h (Tc 1)) with addition and increasing BaO caused a decrease in the glass-forming ability of glasses. It was also found that the thermal stability of these glasses against crystallization decreased with increase in BaO concentration into chemical composition of base glass, i.e., glass without barium oxide. The FTIR spectra were measured to understand the structure of the obtained tellurite-phosphate oxide glasses. The results have shown that phosphorous and tellurium ions were taken part in the formation of the glass network of the studied glasses. The addition of BaO caused significant changes in the FTIR spectra of glasses. More and more TeO 3 and TeO 3?d units and PO 4 2groups (Q 1 units) were created when the BaO was added into the chemical composition of the base glass. Increasing barium ions content into the chemical composition of glasses caused depolymerization of the tellurite-phosphate oxide glass network. Keywords Tellurite-phosphate oxide glasses Á BaO Á Glass-forming stability Á Glass stability Á Structure

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Section: Introductionmentioning

confidence: 99%

Influence of barium oxide on glass-forming ability and glass stability of the tellurite–phosphate oxide glasses

Leśniak

Szal

Starzyk

et al. 2019

J Therm Anal Calorim

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“…The decay curve exhibits a single-exponential behavior for Sm 3+ concentrations up to 0.15 mol%, whereas, for concentrations above 0.15 mol%, it becomes non-exponential. The experimental lifetime (τ m ) was determined by calculating the average or effective lifetime using the following expression [34,44]: G 5/2 level with increasing concentration, shown in figure 4(a), is attributed to non-radiative energy transfer between neighboring Sm 3+ ions. The Inokuti-Hirayama model is suitable for describing nonradiative energy transfer processes.…”

Section: Samplementioning

confidence: 99%

“…In this study, glasses with the composition of 65TeO 2 -15Li 2 O-20ZnO containing varying concentrations of Sm 2 O 3 (Sm 3+ : TLZ) were prepared. This specific composition was chosen because the presence of Li 2 O and ZnO increases the network connectivity and reduces the phonon energy compared to TeO 2 -ZnO glasses [34][35][36], leading to higher quantum efficiencies. In this work, the structural, and optical properties of these samples, as well as the temperature dependence of their emissions were extensively investigated.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic studies of TeO₂-based glasses doped with Sm³⁺ and its use as an optical temperature sensor

Gunha,

Sales,

Muniz

et al. 2024

Phys. Scr.

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This study reports the synthesis and characterization of glasses in the (100-x) 65TeO2-15Li2O-20ZnO + x Sm2O3 system doped with Sm2O3, denoted as Sm3+: TLZ glasses, with varying doping concentrations from 0.1, 0.15, 0.2, 0.35, 0.5, and 1 mol%. The structural and optical properties, as well as the temperature dependence of luminescence, were investigated. Excitation at 405 nm resulted in strong orange-red luminescence at 566, 600, and 646 nm. The local environment surrounding Sm3+ ions was explored using the intensity ratio of electric and magnetic dipole transitions. The non-radiative energy transfer between neighboring Sm3+ ions was evaluated using the Inokuti-Hirayama model, allowing for the determination of the critical transfer distance. The temperature dependence of luminescence, displayed by Commission Internationale de L'Eclairage (CIE) chromaticity coordinates, exhibited a monotonic change from (0.611, 0.387) at 295 K to (0.605, 0.393) at 479 K. The Sm3+:TLZ glasses doped with 0.15 mol% showed the highest relative thermal sensitivity of 0.10%K-1 at 479 K, suggesting their potential as luminescent thermometers.

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Some Physical Characteristics of Tellurite Glasses and Tellurite Glass Ceramics

El-Mallawany

2023

The Physics of Advanced Optical Materials: Tellurite Glasses

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Luminescence and upconversion processes in Er3+-doped tellurite glasses

Cited by 25 publications

References 40 publications

Influence of barium oxide on glass-forming ability and glass stability of the tellurite–phosphate oxide glasses

Influence of barium oxide on glass-forming ability and glass stability of the tellurite–phosphate oxide glasses

Spectroscopic studies of TeO₂-based glasses doped with Sm³⁺ and its use as an optical temperature sensor

Some Physical Characteristics of Tellurite Glasses and Tellurite Glass Ceramics

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Luminescence and upconversion processes in Er3+-doped tellurite glasses

Cited by 25 publications

References 40 publications

Influence of barium oxide on glass-forming ability and glass stability of the tellurite–phosphate oxide glasses

Influence of barium oxide on glass-forming ability and glass stability of the tellurite–phosphate oxide glasses

Spectroscopic studies of TeO2-based glasses doped with Sm3+ and its use as an optical temperature sensor

Some Physical Characteristics of Tellurite Glasses and Tellurite Glass Ceramics

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Spectroscopic studies of TeO₂-based glasses doped with Sm³⁺ and its use as an optical temperature sensor