Luminescence properties of Tb3+ ions in zinc fluorophosphate glasses for green laser applications

Linganna, K.; Sreedhar, V.B.; Jayasankar, C.K.

doi:10.1016/j.materresbull.2015.02.062

Cited by 39 publications

(24 citation statements)

References 23 publications

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“…It can be noticed that the I B /I G ratio decreased with increasing Tb 3+ concentration due to quenching of the D 3 → 7 F 4 emission. The similar behavior has been reported in other Tb 3+ -doped glasses [3,4,22]. Therefore, the I B /I G parameter is useful to detect the quenching degree of the Tb 3+ blue emission.…”

Section: Absorption Emission and Decay Propertiessupporting

confidence: 84%

“…Previous studies have shown that Tb 3+ and Eu 3+ are appropriate indicator ions for local structure investigations around the RE ions due to their electronic structure [18,19]. Tb 3+ ions are used for examination of radiative decay rates and energy transfer processes [3][4][5][18][19][20][21][22][23]. Therefore, in the present study, absorption, emission and decay properties (intensity ratios and lifetime) were derived for the Tb 3+ -doped fluorophosphate glasses in order to know the local structure properties around the RE ions for definite applications.…”

Section: Absorption Emission and Decay Propertiesmentioning

confidence: 99%

“…In view of the above facts/importance, it has been essential to see the alternative process to get the visible laser output with high quantum efficiency. Oxide glasses activated by Tb 3+ have demonstrated to be attractive candidates for gain media in the green region around 546 nm, since the 5 D 4 → 7 F 5 transition of Tb 3+ ion provides a four-level laser system with a lower threshold pump power compared with that of Er 3+ ions [3][4][5][6][7]. Moreover, experimental branching ratios of the 546 nm band are usually more than 50%, which makes the Tb 3+ a promising ion for green laser applications.…”

Section: Introductionmentioning

confidence: 99%

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Luminescence and decay characteristics of Tb³⁺-doped fluorophosphate glasses

Linganna

Basavapoornima

et al. 2018

Journal of Asian Ceramic Societies

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Tb 3+-doped fluorophosphate glasses with the composition of P 2 O 5-K 2 O-SrF 2-Al 2 O 3-x Tb 4 O 7 (where x = 0.1, 0.5, 1.0, 2.0 and 4.0 mol%) were prepared by a conventional high temperature melt quenching technique and characterized through absorption, emission, excitation and decay measurements. From the emission studies, a strong green emission at around 546 was observed, which corresponds to the 5 D 4 → 7 F 5 transition of Tb 3+ ion. Green/blue intensity ratios (I G /I B) were evaluated as a function of Tb 3+ concentration and vice versa. Higher I G /I B intensity ratio confirms the higher covalency between Tb-O bond and higher asymmetry around the Tb 3+ ions in the present fluorophosphate glasses. The decay curves for the 5 D 4 level of Tb 3+ ion were measured and found that they exhibited single exponential nature irrespective to the dopant concentration. The experimental lifetime was determined using single exponential fitting and found that it increased from 2.65 to 2.95 ms when Tb 3+ concentration increased from 0.1 mol% to 4.0 mol%. The derived properties were compared to the other Tb 3+-doped glasses in order to see the potentiality of the material for visible laser gain media at 546 nm.

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Section: Absorption Emission and Decay Propertiessupporting

confidence: 84%

Section: Absorption Emission and Decay Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Luminescence and decay characteristics of Tb³⁺-doped fluorophosphate glasses

Linganna

Basavapoornima

et al. 2018

Journal of Asian Ceramic Societies

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“…This trend may be due to greater depolymerization of BaO network modifier oxide, which is in accordance with FT‐IR spectra . The PL spectra do not show any peaks from the higher lying states such as 5 D 1 , which is due to the high phonon energy of the phosphate glass …”

Section: Resultsmentioning

confidence: 99%

Structural and emission properties of Eu³⁺‐doped alkaline earth zinc‐phosphate glasses for white LED applications

Jha

Jayasimhadri

2017

J Am Ceram Soc

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Quaternary alkaline earth zinc-phosphate glasses in molar composition (40 À x) ZnO -35P 2 O 5 -20RO -5TiO 2 -xEu 2 O 3 (where x=1 and R=Mg, Ca, Sr, and Ba) were prepared by melt quenching technique. These glasses were studied with respect to their thermal, structural, and photoluminescent properties. The maximum value of the glass transition temperature (T g ) was observed for BaO network modifier mixed glass and minimum was observed for MgO network modifier glass. All the glasses were found to be amorphous in nature. The FT-IR suggested the glasses to be in pyrophosphate structure, which matches with the theoretical estimation of O/P atomic ratio and the maximum depolymerization was observed for glass mixed with BaO network modifier. The intense emission peak was observed at 613 nm ( 5 D 0 ? 7 F 2 ) under excitation of 392 nm, which matches well with excitation of commercial n-UV LED chips. The highest emission intensity and quantum efficiency was observed for the glass mixed with BaO network modifier. Based on these results, another set of glass samples was prepared with molar composition (40 À x) ZnO -35P 2 O 5 -20BaO -5TiO 2 -xEu 2 O 3 (x=3, 5, 7, and 9) to investigate the optimized emission intensity in these glasses. The glasses exhibited crystalline features along with amorphous nature and a drastic variation in asymmetric ratio at higher concentration (7 and 9 mol%) of Eu 2 O 3 . The color of emission also shifted from red to reddish orange with increase in the concentration of Eu 2 O 3 . These glasses are potential candidates to use as a red photoluminsecent component in the field of solid-state lighting devices. K E Y W O R D S europium, FT-IR, glass, phosphates, photoluminescence

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“…Interest in such systems is due to the widespread use of phosphors and scintillator materials, activated a couple of Tb-Eu, in scientific and technological fields [2]. For example, glass doped with terbium, are used in radiography as thermal neutron detectors due to their unique optical properties [3].…”

Section: Introductionmentioning

confidence: 99%

Luminescent properties of lithium-phosphate-borate glasses doped with Tb³⁺/ Eu³⁺ions

Valiev

Степанов

Liang

2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Luminescence properties of Tb3+ ions in zinc fluorophosphate glasses for green laser applications

Cited by 39 publications

References 23 publications

Luminescence and decay characteristics of Tb³⁺-doped fluorophosphate glasses

Luminescence and decay characteristics of Tb³⁺-doped fluorophosphate glasses

Structural and emission properties of Eu³⁺‐doped alkaline earth zinc‐phosphate glasses for white LED applications

Luminescent properties of lithium-phosphate-borate glasses doped with Tb³⁺/ Eu³⁺ions

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Luminescence properties of Tb3+ ions in zinc fluorophosphate glasses for green laser applications

Cited by 39 publications

References 23 publications

Luminescence and decay characteristics of Tb3+-doped fluorophosphate glasses

Luminescence and decay characteristics of Tb3+-doped fluorophosphate glasses

Structural and emission properties of Eu3+‐doped alkaline earth zinc‐phosphate glasses for white LED applications

Luminescent properties of lithium-phosphate-borate glasses doped with Tb3+/ Eu3+ions

Contact Info

Product

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Luminescence and decay characteristics of Tb³⁺-doped fluorophosphate glasses

Luminescence and decay characteristics of Tb³⁺-doped fluorophosphate glasses

Structural and emission properties of Eu³⁺‐doped alkaline earth zinc‐phosphate glasses for white LED applications

Luminescent properties of lithium-phosphate-borate glasses doped with Tb³⁺/ Eu³⁺ions