ZnO thin films deposited by RF magnetron sputtering: Effects of the annealing and atmosphere conditions on the photocatalytic hydrogen production

Cruz, M.R. Alfaro; Ceballos-Sánchez, O.; Luévano-Hipólito, E.; Torres-Martı́nez, Leticia M.

doi:10.1016/j.ijhydene.2018.04.054

Cited by 78 publications

(21 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results regarding Zn and O contents were 51.4 and 48.3 at%, respectively, confirming the expected deficiency of oxygen in ZnO produced by a sputtering process without O in the sputtering chamber. This oxygen deficiency is often reported . The same deficiency was observed for the as‐grown undoped ZnO films (51.4 at% for Zn and 48.3 at% for O).…”

Section: Resultssupporting

confidence: 79%

Thermal Treatments and Photoluminescence Properties of ZnO and ZnO:Yb Films Grown by Magnetron Sputtering

Guillaume

Labbé

Frilay

et al. 2018

Physica Status Solidi (a)

View full text Add to dashboard Cite

This work is on ZnO and ZnO:Yb (0.3 at%) films prepared on (100) Si substrates by magnetron sputtering and deals with their structural and photoluminescence evolutions upon annealing at different temperatures from 873 to 1173 K during 1 h under N 2 atmosphere. The microstructural characterizations reveal that, for both sample series, annealing treatment improves the crystallinity of ZnO of the upper part of the films. However, (002) textured ZnO columnar growth is only observed for ZnO films. For annealing temperatures higher than 973 K, rare earth and Si diffusions toward the film/substrate interface are observed resulting in the appearance of a zinc silicate phase for ZnO films and a composite material made of nanoscale ZnO grains surrounded by an amorphous phase for ZnO:Yb films. In addition, photoluminescence measurements show that Yb doping in ZnO results in a lower integrated photoluminescence intensity compared to that of ZnO films and the photoluminescence response in the visible spectral range is also modified most probably due to the presence of dopant. Furthermore, the PL intensity at 980 nm originating from electronic transitions between 2 F 5/2 and 2 F 7/2 levels of Yb 3þ ion increased with temperature. At last, the evolutions of the PL emissions with temperature from the ZnO defects are discussed.

show abstract

Section: Resultssupporting

confidence: 79%

Thermal Treatments and Photoluminescence Properties of ZnO and ZnO:Yb Films Grown by Magnetron Sputtering

Guillaume

Labbé

Frilay

et al. 2018

Physica Status Solidi (a)

View full text Add to dashboard Cite

show abstract

“…These two ZnO thin film samples showed an optical transmittance value of approximately 83% in the wavelength range of 300-800 nm. This result is in the common level (75%-90%) of the optical transmittance for ZnO thin films [34,35]. Meanwhile, in the wavelength range of 300-370 nm, the as-received ZnO thin film on the quartz glass substrate exhibited a transmission of about 20%, which was much lower than that on the sapphire (001) substrate (approximately 60%).…”

Section: Resultsmentioning

confidence: 70%

Comparative Study of ZnO Thin Films Grown on Quartz Glass and Sapphire (001) Substrates by Means of Magnetron Sputtering and High-Temperature Annealing

et al. 2019

View full text Add to dashboard Cite

In this work, we reported a comparative study of ZnO thin films grown on quartz glass and sapphire (001) substrates through magnetron sputtering and high-temperature annealing. Firstly, the ZnO thin films were deposited on the quartz glass and sapphire (001) substrates in the same conditions by magnetron sputtering. Afterwards, the sputtered ZnO thin films underwent an annealing process at 600 °C for 1 h in an air atmosphere to improve the quality of the films. X-ray diffraction, scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy (XPS), ultraviolet-visible spectra, photoluminescence spectra, and Raman spectra were used to investigate the structural, morphological, electrical, and optical properties of the both as-received ZnO thin films. The ZnO thin films grown on the quartz glass substrates possess a full width of half maximum value of 0.271° for the (002) plane, a surface root mean square value of 0.50 nm and O vacancies/defects of 4.40% in the total XPS O 1s peak. The comparative investigation reveals that the whole properties of the ZnO thin films grown on the quartz glass substrates are comparable to those grown on the sapphire (001) substrates. Consequently, ZnO thin films with high quality grown on the quartz glass substrates can be achieved by means of magnetron sputtering and high-temperature annealing at 600 °C.

show abstract

“…The 529.3 and 531.2 peaks were associated with the O 2− ions on the O-Zn and O-Al bonds, so it can be assumed that these ions are located at the ZnO x and AlO x sites (tetrahedral or octahedral) in the spinel [ 28 ]. The peak located at 532.6 eV was associated with the chemisorbed oxygen on the material’s surface [ 29 , 30 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of ZnAl2O4 and Evaluation of the Response in Propane Atmospheres of Pellets and Thick Films Manufactured with Powders of the Oxide

Huízar-Padilla

Guillén-Bonilla

et al. 2021

Sensors

View full text Add to dashboard Cite

ZnAl2O4 nanoparticles were synthesized employing a colloidal method. The oxide powders were obtained at 300 °C, and their crystalline phase was corroborated by X-ray diffraction. The composition and chemical structure of the ZnAl2O4 was carried out by X-ray and photoelectron spectroscopy (XPS). The optical properties were studied by UV-vis spectroscopy, confirming that the ZnAl2O4 nanoparticles had a direct transition with bandgap energy of 3.2 eV. The oxide’s microstructures were microbars of ~18.2 nm in size (on average), as analyzed by scanning (SEM) and transmission (TEM) electron microscopies. Dynamic and stationary gas detection tests were performed in controlled propane atmospheres, obtaining variations concerning the concentration of the test gas and the operating temperature. The optimum temperatures for detecting propane concentrations were 200 and 300 °C. In the static test results, the ZnAl2O4 showed increases in propane response since changes in the material’s electrical conductance were recorded (conductance = 1/electrical resistance, Ω). The increases were ~2.8 at 200 °C and ~7.8 at 300 °C. The yield shown by the ZnAl2O4 nanoparticles for detecting propane concentrations was optimal compared to other similar oxides categorized as potential gas sensors.

show abstract

ZnO thin films deposited by RF magnetron sputtering: Effects of the annealing and atmosphere conditions on the photocatalytic hydrogen production

Cited by 78 publications

References 43 publications

Thermal Treatments and Photoluminescence Properties of ZnO and ZnO:Yb Films Grown by Magnetron Sputtering

Thermal Treatments and Photoluminescence Properties of ZnO and ZnO:Yb Films Grown by Magnetron Sputtering

Comparative Study of ZnO Thin Films Grown on Quartz Glass and Sapphire (001) Substrates by Means of Magnetron Sputtering and High-Temperature Annealing

Synthesis of ZnAl2O4 and Evaluation of the Response in Propane Atmospheres of Pellets and Thick Films Manufactured with Powders of the Oxide

Contact Info

Product

Resources

About