Ultraviolet Upconversion Luminescence in a Highly Transparent Triply-Doped Gd3+–Tm3+–Yb3+ Fluoride–Phosphate Glasses

Galleani, Gustavo; Santagneli, Silvia H.; Ledemi, Yannick; Messaddeq, Younès; Janka, Oliver; Pöttgen, Rainer; Eckert, Hellmut

doi:10.1021/acs.jpcc.7b09562

Cited by 39 publications

(31 citation statements)

References 57 publications

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“…All experimental data can be perfectly fitted using linear function with the slopes of 1.79–2.22 on a log-log plot giving n ≈ 2. We concluded that the observed 2 H 11/2 – 4 I 15/2 , 4 S 3/2 – 4 I 15/2 and 4 S 3/2 – 4 I 15/2 transitions in NaYF 4 : Yb, Er, and Gd samples originated from two-photon process [ 37 ] irrespective of Gd 3+ co-doping concentration. Figure 4 d–f present integral emission intensity of the blue and red emission lines as a function of the pump laser power for NaYF 4 : Yb, Tm, and Gd powders.…”

Section: Resultsmentioning

confidence: 99%

Gd3+-Doping Effect on Upconversion Emission of NaYF4: Yb3+, Er3+/Tm3+ Microparticles

et al. 2020

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β-NaYF4 microcrystals co-doped with Yb3+, Er3+/Tm3+, and Gd3+ ions were synthesized via a hydrothermal method using rare-earth chlorides as the precursors. The SEM and XRD data show that the doped β-NaYF4 form uniform hexagonal prisms with an approximate size of 600–800 nm. The partial substitution of Y by Gd results in size reduction of microcrystals. Upconversion luminescence spectra of microcrystals upon 980 nm excitation contain characteristic intra-configurational ff bands of Er3+/Tm3+ ions. An addition of Gd3+ ions leads to a significant enhancement of upconversion luminescence intensity with maxima at 5 mol % of dopant.

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Section: Resultsmentioning

confidence: 99%

Gd3+-Doping Effect on Upconversion Emission of NaYF4: Yb3+, Er3+/Tm3+ Microparticles

et al. 2020

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“…As for compound 1, when it was excited by the wavelength of 290 nm, its photoluminescence emission spectrum exhibits one sharp emission band in the narrow range of 306-328 nm with the peak locating at 313 nm (Figure 3). This emission can be assigned to the characteristic emission of the 4f electron intrashell transition of 6 P 7/2 → 8 S 7/2 (Gd 3+ ) [26,27]. The CIE system characterizes colors by two color coordinates x and y which specify the point on the chromaticity diagram.…”

Section: Solid-state Photoluminescencementioning

confidence: 99%

Preparation and characterization of a gadolinium compound with high thermal stability

Chen¹

2021

Bull. Chem. Soc. Eth.

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A new lanthanide compound [Gd(2,5-HPA)(2,5-PA)]n (1; 2,5-H2PA = 2,5-pyridinedicarboxylic acid) was obtained through hydrothermal reactions and structurally characterized by single-crystal X-ray diffraction. It possesses a three-dimensional (3-D) framework structure. Solid-state photoluminescence experiment revealed that it shows dark blue emission band, which can be assigned to the characteristic emission of the 4f electron intrashell transition of 6P7/2 → 8S7/2 (Gd3+). The energy transfer mechanism was explained by an energy level diagram of the gadolinium ion and 2,5-pyridinedicarboxylic acid ligand. It displayed remarkable CIE chromaticity coordinates of 0.1346 and 0.0678. The solid-state UV/Vis diffuse reflectance spectra unveiled that it possesses a wide optical band gap of 3.52 eV. Thermogravimetry (TG) measurements revealed that this compound is highly thermal stable up to around 500 °C. KEY WORDS: CIE, Energy transfer, Lanthanide, Photoluminescence, Thermal stability Bull. Chem. Soc. Ethiop. 2020, 34(3), 479-488. DOI: https://dx.doi.org/10.4314/bcse.v34i3.5

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“…Among them, the phosphate network is considered an efficient optical host due to its high thermal stability, high transparency over the UVvisible wavelength range, and especially good solubility of rare-earth ions. The lack of chemical durability of the phosphate glass network is usually treated via inlaying the phosphate network with suitable alkali and alkaline earth oxides [12][13][14] .…”

Section: Introductionmentioning

confidence: 99%

“…Hence, heavy metals oxyfluorophosphate glasses are promising hosts for several photonic applications because they have both oxides and fluorides characteristics. At the low ratios of phosphate/fluoride, fluoride ligation dominates on the local environment of the Re 3+ ions, which is significant for high quantum yield and phonon-assisted energy transfer processes [13][14][15] . Trivalent erbium ion Er 3+ is usually used in various hosts as a dopant because of its peculiar optical properties.…”

Section: Introductionmentioning

confidence: 99%

Er3+ ion doped low phonon energy glass as a white light emitter

Saeed

Abu-raia

Farag

2021

Egyptian Journal of Solids

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White light emitters remain in the need of continual development and research for new materials. In this context, a low phonon energy glass containing Er 3+ ions was prepared using the conventional melt/casting technique. The chemical compositions of the synthesized materials were analyzed using X-Ray Fluorescence (XRF) measurements. X-Ray Diffraction (XRD) pattern strongly affirms the non-crystalline essence of the produced materials. The behavior of both density and Fourier Transform Infrared (FTIR) spectroscopy denoted that the Er 3+ ions have a modifier role and non-bridging oxygens NBOs were formed inside the studied glass network. The studied glasses have low phonon energy, ranging from 647 to 659 cm -1 . The obtained results of the thermal, thermo-mechanical, mechanical, and optical properties were discussed in light of the structural changes brought about by inserting Er 3+ ions inside the studied network. The present glasses have high thermal stability, high thermal expansion, and high refractive index. With the increase of Er 3+ ion content, the Vickers microhardness VMH decreased from 3.78 GPa to 3.20 GPa. Under near ultraviolet NUV 380 nm excitation wavelength, three emission bands; blue, green, and red are observed. The white light is possible by a suitable combination of these colors. The cool white light emission was confirmed using CIE 1931 chromaticity diagram and correlated color temperature values. According to the obtained results, the studied glasses are nominated as a white light emitter in photonic applications.

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Ultraviolet Upconversion Luminescence in a Highly Transparent Triply-Doped Gd³⁺–Tm³⁺–Yb³⁺ Fluoride–Phosphate Glasses

Cited by 39 publications

References 57 publications

Gd3+-Doping Effect on Upconversion Emission of NaYF4: Yb3+, Er3+/Tm3+ Microparticles

Gd3+-Doping Effect on Upconversion Emission of NaYF4: Yb3+, Er3+/Tm3+ Microparticles

Preparation and characterization of a gadolinium compound with high thermal stability

Er3+ ion doped low phonon energy glass as a white light emitter

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