Yttria and ceria doped zirconia thin films grown by pulsed laser deposition

Saporiti, F.; Juárez, R.E.; Audebert, F.; Boudard, Michel

doi:10.1590/s1516-14392013005000053

Cited by 14 publications

(9 citation statements)

References 31 publications

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“…The as grown films were found to be amorphous and only showed a broad background (spectra not shown). All the peaks observed in the spectra belong to the Eu 2 O 3 films except the peak at 2θ = 33° that correspond to the Si (100) substrate and has been cut off for the analysis [16,17]. No signal from the a-Al 2 O 3 is detected in any of the spectra, indicating that the Al 2 O 3 layers remain amorphous after the annealing.…”

Section: Figures 4 A) and 4 B)mentioning

confidence: 99%

Tuning Eu3+ emission in europium sesquioxide films by changing the crystalline phase

Mariscal

Quesada

Camps

et al. 2016

Applied Surface Science

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We report the growth of europium sesquioxide (Eu 2 O 3) thin films by pulsed laser deposition (PLD) in vacuum at room temperature from a pure Eu 2 O 3 ceramic bulk target. The films were deposited in different configurations formed by adding capping and/or buffer layers of amorphous aluminum oxide (a-Al 2 O 3). The optical properties, refractive index and extinction coefficient of the as deposited Eu 2 O 3 layers were obtained. X-ray photoelectron spectroscopy (XPS) measurements were done to assess its chemical composition. Post-deposition annealing was performed at 500°C and 850 °C in air in order to achieve the formation of crystalline films and to accomplish photoluminescence emission. According to the analysis of X-ray diffraction (XRD) spectra, cubic and monoclinic phases were formed. It is found that the relative amount of the phases is related to the different film configurations, showing that the control over the crystallization phase can be realized by adequately designing the structures. All the films showed photoluminescence emission peaks (under excitation at 355 nm) that are attributed to the intra 4f-transitions of Eu 3+ ions. The emission spectral shape depends on the crystalline phase of the Eu 2 O 3 layer. Specifically, changes in the hypersensitive 5 D 0 → 7 F 2 emission confirm the strong influence of the crystal field effect on the Eu 3+ energy levels.

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Section: Figures 4 A) and 4 B)mentioning

confidence: 99%

Tuning Eu3+ emission in europium sesquioxide films by changing the crystalline phase

Mariscal

Quesada

Camps

et al. 2016

Applied Surface Science

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“…The thickness increases with the number of pulses from 1000 to 20 000 pulses, with a quasi-linear increase up to 10 000 pulses, then a decrease in the deposition rate for the highest number of pulses. The chemical or physical modifications of the ablated target may be the cause of this decrease in the deposition rate and suggest that the changes in the target morphology induce a plume deflection effect (thus explaining the decrease) when the target is subjected to a long period of irradiation. , Under these conditions, the maximum thickness of 150 nm is reached after 20 000 pulses. Similarly, the influence of the energy parameter was studied during the deposition of VB (healing agent) from 200 to 300 mJ.…”

Section: Resultsmentioning

confidence: 99%

Self-Healing Glassy Thin Coating for High-Temperature Applications

Castanie

Carlier

Méar

et al. 2016

ACS Appl. Mater. Interfaces

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Glass thin films (with nanometer to micrometer thicknesses) are promising in numerous applications, both as passive coatings and as active components. Self-healing is a feature of many current technological developments as a means of increasing the lifetime of materials. In the context of these developments, we report on the elaboration of the first self-healing glassy thin-film coating developed specifically for high-temperature applications. This coating is obtained by pulsed laser deposition of alternating layers of vanadium boride (VB) and a multicomponent oxide glass. Self-healing is obtained through the oxidation of VB at the operating temperature. The investigation of the effect of elaboration parameters on the coating composition and morphology made it possible to obtain up to seven-layer coatings, with good homogeneity and perfect interfaces, and with a total thickness of less than 1 μm. The autonomic self-healing capacity of the coating has been demonstrated by an in situ experiment, which shows that a crack of nanometric dimension can be healed within a few minutes at 700 °C.

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“…The PLD method is the physical technique that able to improve the crystallization process during the formation of cell component to produce a high-quality product . The process is heated around 400-700°C to obtain the high quality of crystalline thin films .47,128,129 Saporiti et al 130 utilized this fabrication method to produced two types of SOFC electrolyte based on zirconia, yttria, and ceria. In addition, the PLD method has a high potential for scaling up the mass production size and volume of the thin-film cell component.…”

Section: Pulsed Laser Depositionmentioning

confidence: 99%

“…The manipulated variables influence the atoms of raw materials in these methods are power density, wavelength, target composition and temperature for gas-surface interaction. The process is heated around 400-700°C to obtain the high quality of crystalline thin films .47,128,129 Saporiti et al 130 utilized this fabrication method to produced two types of SOFC electrolyte based on zirconia, yttria, and ceria. Both of electrolyte succeed to produce a When the thermal treatment is at 650°C and oxygen gas pressure at 10 Pa, the SDC electrolyte performed the conductivity until 0.075 S cm -1 at 800°C temperature operation.…”

Section: Pulsed Laser Depositionmentioning

confidence: 99%

A review of solid oxide fuel cell component fabrication methods toward lowering temperature

et al. 2019

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The solid oxide fuel cells (SOFCs) emerge as an alternative power generation system for high-scale stationary application and power plant station. The SOFC consumption leads to the high-efficiency energy production that forms variety of fuels up to 60% energy conversion; the operation system does not involve the burning process and minimizes the air pollution. Also, the aptitude to provide the cogenerative energy production from the heat waste during the operation process serve SOFC as an attractive green technology and environmentally friendly. However, the SOFC consumption remains limited for transportation and portable applications because the simple design of power source compartment is still the major hurdle in each SOFC component development and commercialization. Therefore, the appropriate fabrication method of each SOFC component is important to achieve the reliability of the SOFC application for the small-scale power generation design. In this paper, an overview of the design types and SOFC components and properties following electrode, electrolyte, interconnect and sealant are discussed and summarized. As the thirdgeneration fuel cells, which entice the commercialization stage, this paper concentrates more on the fabrication method of each SOFC components that were explored including the working principle, advantage, disadvantage and several previous works on each fabrication method, which are described to finding the appropriate fabrication method toward lowering the operating temperature and develop the simple design of SOFC power sources system for the transportation and portable application. The targeted market power production of SOFC system for transportation application is about 5 kW and 250 W for portable application.

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Yttria and ceria doped zirconia thin films grown by pulsed laser deposition

Cited by 14 publications

References 31 publications

Tuning Eu3+ emission in europium sesquioxide films by changing the crystalline phase

Tuning Eu3+ emission in europium sesquioxide films by changing the crystalline phase

Self-Healing Glassy Thin Coating for High-Temperature Applications

A review of solid oxide fuel cell component fabrication methods toward lowering temperature

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