Spectroscopic properties of antimony modified germanate glass doped with Eu3+ ions

Szal, R.; Żmojda, Jacek; Kochanowicz, Marcin; Miluski, Piotr; Dorosz, Jan; Leśniak, Magdalena; Jeleń, Piotr; Starzyk, Bartłomiej; Sitarz, Maciej; Kuwik, Marta; Pisarska, Joanna; Pisarski, Wojciech A.; Iijima, Yuta; Mori, Tatsuya; Dorosz, Dominik

doi:10.1016/j.ceramint.2019.08.223

Cited by 21 publications

(6 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is assumed that glasses with low phonon energy are more suitable as host materials for rare earth ions because of less probable non-radiative relaxation process, which may result in a higher lifetime of the excited state. According to experimental results presented in Table 3, the luminescence lifetime for 5 D 0 excited state evaluated for glass samples (Ge-Eu and TiGe-Eu) is similar to the values obtained for various germanate systems doped with europium ions [52][53][54][55][56][57][58][59][60]. However, as has already been discussed for low-phonon glass-hosts containing Eu 3+ ions, the non-radiative relaxation process can be neglected.…”

Section: Titanate-germanate Glasses Doped With Europium Ionssupporting

confidence: 82%

“…Therefore, the value of lifetime for 5 D 0 state in glass sample Ge-Eu (790 cm −1 ) is longer than the value of lifetime for systems with titanium oxide (765 cm −1 ), lead oxide (775 cm −1 ), and bismuth oxide (770 cm −1 ) [ 51 , 52 , 53 ]. Moreover, it was stated that the fluorescence intensity ratio R/O (Eu 3+ ) was increased from 3.54 (Ge-Eu) to 4.10 (TiGe-Eu) for the glass samples and the value of this spectroscopic parameters is significantly higher than those of lead germanate glasses [ 52 , 57 ] antimony [ 55 ] and tellurium [ 56 ] oxides-modified germanate systems. The obtained value of the ratio R/O indicates the higher local asymmetry around the Eu 3+ ions in the glass host.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Novel Multicomponent Titanate-Germanate Glasses: Synthesis, Structure, Properties, Transition Metal, and Rare Earth Doping

et al. 2020

View full text Add to dashboard Cite

Novel multicomponent titanate-germanate glasses singly doped with transition metal (Cr3+) and rare earth ions (Eu3+) were synthesized and the glass transition temperatures and thermal stability parameters were determined using DSC measurements. X-ray diffraction analysis confirmed fully amorphous nature of the received samples. Their structural and optical properties were compared with germanate glasses without TiO2. Correlation between local structure and optical properties in titanate-germanate glasses is well evidenced by FT-IR, Raman, EPR, and luminescence spectroscopy. In particular, luminescence spectra and their decays are examined for glass samples, where GeO2 was partially substituted by TiO2.

show abstract

Section: Titanate-germanate Glasses Doped With Europium Ionssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Novel Multicomponent Titanate-Germanate Glasses: Synthesis, Structure, Properties, Transition Metal, and Rare Earth Doping

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Until now, these glasses have been modified by various oxides [22] and fluorides [23], however novel luminescent properties can be proposed. In our earlier works, we showed that the substitution of BaO by Sb 2 O 3 and TeO 2 in GGB glasses doped with Eu 3+ ions led to the polymerization of the structure and ordering processes, along with increasing amounts of modifiers [24,25]. The choice of europium as a well-known "structural probe" allowed investigation of the crystal field symmetry in photonic materials [26].…”

Section: Introductionmentioning

confidence: 99%

Luminescent Studies on Germanate Glasses Doped with Europium Ions for Photonic Applications

et al. 2020

View full text Add to dashboard Cite

Glass and ceramic materials doped with rare earth (RE) ions have gained wide interest in photonics as active materials for lasers, optical amplifiers, and luminescent sensors. The emission properties of RE-doped glasses depend on their chemical composition, but they can also be tailored by modifying the surrounding active ions. Typically, this is achieved through heat treatment (including continuous-wave and pulsed lasers) after establishing the ordering mechanisms in the particular glass–RE system. Within the known systems, silicate glasses predominate, while much less work relates to materials with lower energy phonons, which allow more efficient radiation sources to be constructed for photonic applications. In the present work, the luminescent and structural properties of germanate glasses modified with phosphate oxide doped with Eu3+ ions were investigated. Europium dopant was used as a “spectroscopic probe” in order to analyze the luminescence spectra, which characterizes the changes in the local site symmetries of Eu3+ ions. Based on the spectroscopic results, a strong influence of P2O5 content was observed on the excitation and luminescence spectra. The luminescence study of the most intense 5D0→7F2 (electric dipole) transition revealed that the increase in the P2O5 content leads to the linewidth reduction (from 15 nm to 10 nm) and the blue shift (~2 nm) of the emission peak. According to the crystal field theory, the introduction of P2O5 into the glass structure changes the splitting number of sublevels of the 5D0→7F1 (magnetic dipole) transition, confirming the higher polymerization of fabricated glass. The slightly different local environment of Eu3+ centers the results in a number of sites and causes inhomogeneous broadening of spectral lines. It was found that the local asymmetry ratio estimated by the relation of (5D0→7F2)/(5D0→7F1) transitions also confirms greater changes in local symmetry around Eu3+ ions. Our results indicate that modification of germanate glass by P2O5 allows control of their structural properties in order to functionalize the emissions for application as luminescent light sources and sensors.

show abstract

“…Previous reports showed that many types of germanate glass had been studied using vibrational spectroscopy [ 46 , 47 , 48 , 49 ]. Initially, the precise determination of the network units characterized by multicomponent germanate matrices was a complicated task due to the character of composed network-forming or network-modifier oxides.…”

Section: Resultsmentioning

confidence: 99%

Raman and Infrared Spectroscopy of Barium-Gallo Germanate Glasses Containing B2O3/TiO2

et al. 2023

View full text Add to dashboard Cite

Modified barium gallo-germanate glass hosts are still worthy of attention in studying structure–property relationships. In this work, two different series of glass systems based on (60-x)GeO2-xTiO2-30BaO-10Ga2O3 and (60-x)GeO2-xB2O3-30BaO-10Ga2O3 (x = 10, 30, 50 mol%) were synthesized, and their properties were studied using spectroscopic techniques. X-ray diffraction (XRD) patterns revealed that all fabricated glasses were fully amorphous material. The absorption edge shifted toward the longer wavelengths with a gradual substitution of GeO2. The spectroscopic assignments of titanium ions were performed with excitation and emission spectra compared to the additional sample containing an extremely low content of TiO2 (0.005 mol%). On the basis of Raman and FT-IR investigations, it was found that increasing the TiO2 content caused a destructive effect on the GeO4 and GeO6 structural units. The Raman spectra of a sample containing a predominantly TiO2 (50 mol%) proved that the band was located near 650 cm−1, which corresponded to the stretching vibration of Ti-O in TiO6 unit. The deconvoluted IR results showed that the germanate glass network consisted of the coexistence of two BO3 and BO4 structural groups. Based on the experimental investigations, we concluded that the developed materials are a promising candidate for use as novel glass host matrices for doping rare-earth and/or transition metal ions.

show abstract

Spectroscopic properties of antimony modified germanate glass doped with Eu3+ ions

Cited by 21 publications

References 57 publications

Novel Multicomponent Titanate-Germanate Glasses: Synthesis, Structure, Properties, Transition Metal, and Rare Earth Doping

Novel Multicomponent Titanate-Germanate Glasses: Synthesis, Structure, Properties, Transition Metal, and Rare Earth Doping

Luminescent Studies on Germanate Glasses Doped with Europium Ions for Photonic Applications

Raman and Infrared Spectroscopy of Barium-Gallo Germanate Glasses Containing B2O3/TiO2

Contact Info

Product

Resources

About