Novel synthesis, characterization and optical properties of Lu2O3 deposited by electrochemical method

Ahsaine, Hassan Ait; Atourki, Lahoucine; Ezahri, M.; Bouabid, K.; Ihlal, A.; Villain, S.; Benlhachemi, A.

doi:10.1016/j.matlet.2015.07.079

Cited by 9 publications

(5 citation statements)

References 22 publications

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“…37 Electrochemically deposited thin films of Lu 2 O 3 exhibited low transmission in the visible range, which was related to defects. 38 Lu 2 O 3 :Yb transparent ceramics obtained by spark plasma sintering might exhibit dark color (depending on the synthesis parameters). Such coloration was reduced by annealing in air and was yet again attributed to oxygen vacancies.…”

Section: ••mentioning

confidence: 99%

“…The coloration can be healed via annealing in air and is thus attributed to oxygen vacancies . Electrochemically deposited thin films of Lu 2 O 3 exhibited low transmission in the visible range, which was related to defects . Lu 2 O 3 :Yb transparent ceramics obtained by spark plasma sintering might exhibit dark color (depending on the synthesis parameters).…”

Section: Introductionmentioning

confidence: 99%

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Oxygen Vacancy, Oxygen Vacancy–Vacancy Pairs, and Frenkel Defects in Cubic Lutetium Oxide

Shyichuk

Zych

2020

J. Phys. Chem. C

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Electronic and structural properties of cubic Lu2O3 with either single oxygen vacancy, oxygen vacancy–vacancy pair, or a Frenkel pair (an oxygen vacancy and an interstitial oxygen) were analyzed using ab initio density functional theory calculations. A plane-wave ultrasoft pseudopotential approach with local density approximation functional was used to optimize the geometries. A full-potential linearized augmented plane-wave method with meta-generalized gradient approximation was applied to the optimized geometries to calculate the electronic properties of the systems. Defect-related bands were observed between the valence band and the conduction band. Different charge states of the defects were considered. Both oxygen vacancy and oxygen vacancy–vacancy pairs behave as moderately deep electron traps (trap depth 1.3–2.7 eV). Trapped electron localization at the vacancy site(s) was confirmed using electron density and electron localization function plots. The bands originating from oxygen vacancy–vacancy pairs in Lu2O3 exhibit some dependence on the distance between the two entities. The resulting energy differences (considered from an optical absorption point of view) cover ultraviolet, visible, and infrared ranges. Thus, it is plausible that oxygen vacancy–vacancy pairs are responsible for the coloration that is sometimes observed in Lu2O3 powders and crystals. On the contrary, the Frenkel pair exhibits no systematic dependence of the defect-related bands on the distance between its oxygen vacancy and interstitial oxygen, while the resulting defect-related bands look similar to those corresponding to the isolated defects. Frenkel pairs are thus considered a probable mechanism of oxygen vacancy formation and stabilization of Lu2O3. Additionally, a brief review of the relevant experimental data is provided in the introduction.

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Section: ••mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Oxygen Vacancy, Oxygen Vacancy–Vacancy Pairs, and Frenkel Defects in Cubic Lutetium Oxide

Shyichuk

Zych

2020

J. Phys. Chem. C

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“…The commonly known three electrodes set up consisted of Pt electrode, Co 3 O 4 @MnO 2 @NiO/GO composite, and Ag/AgCl as counter, working, and reference electrodes, respectively. To narrate the growth mechanism of Co 3 O 4 @MnO 2 @NiO/GO composite on FTO, several cyclic voltammetry reports on bare FTO have shown that a rapid decrease in the current density from the maximum potential window has been observed [62,63]. This is evident that the CV of the bare FTO does not contribute to the resultant CV of the composite electrodes.…”

Section: Electrochemistry Analysismentioning

confidence: 99%

Trimetallic Oxides/GO Composites Optimized with Carbon Ions Radiations for Supercapacitive Electrodes

Alshoaibi

Awada²,

Obodo³

et al. 2022

Crystals

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Hydrothermally synthesized electrodes of Co3O4@MnO2@NiO/GO were produced for use in supercapacitors. Graphene oxide (GO) was incorporated into the nanocomposites used for electrode synthesis due to its great surface area and electrical conductivity. The synergistic alliance among these composites and GO enhances electrode performance, life span, and stability. The structural properties obtained from the X-ray diffraction (XRD) results suggest that nanocomposites are crystalline in nature. The synergistic alliance among these composites and GO enhances electrode performance, life span, and stability. Performance assessment of these electrodes indicates that their characteristic performance was enhanced by C2+ radiation, with the uttermost performance witnessed for electrodes radiated with 5.0 × 1015 ions/cm2.

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“…Moreover, REEs play an important role in the functionality of different modern commercial technologies, for example, electric vehicles (magnets and batteries), catalytic converters, wind turbines (magnets), fluorescent lighting (phosphors), and defense applications [11]. REEs have attracted interest from multiple nations since these chemical elements are critical and fundamental towards the improvement of modern green energy technologies as well as the economic well-being [11] - [12]. Despite the fact that REEs are abundantly available resources, they are generally widely dispersed and contained in small quantities, which contribute to environmental exhausting mineral extraction and energy intensive fine tuning processes and extraction.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the cubic crystal structure of Lu2O3 helps to make the production of polycrystalline transparent ceramics attainable. In fact, this is largely significant, since the Lu2O3 high melting point of (approximately 2490°C), makes the growth of a single crystal complex possible with normal growth methods [11], [12]. This article focuses on generating a Q-switched pulse laser in an Erbium-doped fiber laser cavity using Lu2O3 film as a saturable absorber with a coupling ratio of 10:90 to generate a high repetition rate, high pulse energy, high SNR, and short pulse width.…”

Section: Introductionmentioning

confidence: 99%

Passively Q-Switched Pulses Generation from Erbium-Doped Fiber Laser Using Lutetium Oxide as Saturable Absorber

Mohamed

Hamida

Eltaif

et al. 2021

J. Microw. Optoelectron. Electromagn. Appl.

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In this paper, a configuration of a passive Q-switched Erbium-doped fiber laser (EDFL) using a Lutetium Oxide (Lu2O3) thin film as a saturable absorber (SA) is experimentally implemented to generate high pulse energy with a high signal to noise ratio. A stable Q-switched pulse train is initiated at the input pump power of 30.442mW, and a maximum pulse energy of 16.11 nJ is obtained at an output power of 0.97 mW, which confirms the stability of the pulses. It was possible to increase the repetition rate of the Q-switched laser from 31.25 to 60.2 kHz as the pump power was raised from 30.442 mW to 71.652 mW. Moreover, the pulse width decreased from 11.4 µs to 4.27 µs and 66.4 dB of the received signal-to-noise ratio at the radio frequency spectrum was achieved.

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Novel synthesis, characterization and optical properties of Lu2O3 deposited by electrochemical method

Cited by 9 publications

References 22 publications

Oxygen Vacancy, Oxygen Vacancy–Vacancy Pairs, and Frenkel Defects in Cubic Lutetium Oxide

Oxygen Vacancy, Oxygen Vacancy–Vacancy Pairs, and Frenkel Defects in Cubic Lutetium Oxide

Trimetallic Oxides/GO Composites Optimized with Carbon Ions Radiations for Supercapacitive Electrodes

Passively Q-Switched Pulses Generation from Erbium-Doped Fiber Laser Using Lutetium Oxide as Saturable Absorber

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