Comparison of ZnO thin films deposited by three different SILAR processes

Vargas‐Hernández, C.; García, Francy Nelly Jiménez; Jurado, J. F.; Granada, V. Henao

doi:10.1016/j.mejo.2008.01.056

Cited by 25 publications

(11 citation statements)

References 6 publications

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“…The entire structure repertoire has generated increased interest due to the rise of nanoscience and nanotechnology. By controlling the growth conditions, it is possible to generate specific diameters, lengths, structural defects, and alignments . Several growth techniques, such as combustion synthesis, chemical solution method, chemical vapor deposition, microemulsion route, vapor‐solid mechanism, sol–gel method, microwave‐assisted synthesis, and plasma‐molecular beam epitaxy, have been used to obtain ZnO.…”

Section: Introductionmentioning

confidence: 99%

Optical and Structural Properties of ZnO and ZnO:Cd Particles Grown by the Hydrothermal Method

2015

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Here, we examine the structural, vibrational, optical, and morphological properties of ZnO particles synthesized by the hydrothermal method, incorporating cadmium at different concentrations through the molar ratio R m = Cd +2 /Zn +2 and a thermal treatment at 500°C. The X-ray diffraction results demonstrated the high crystallinity of the ZnO compound with a wurtzite-type hexagonal structure. The Raman scattering spectra demonstrated that the ZnO vibrational modes occur in the region between 200 and 1300 cm -1 , which is associated with different vibrational configurations characteristic of the ZnO molecule: E 2 (Low), E 2 (M), A 1 (TO) E 1 (TO), 2B 1 (High), E 2 (High), and TA + LO. The modes that were most affected by the incorporation of Cd 2+ were those assigned to 2E 2 (Low), E 2 (M), and 2B 1 (High), and this effect was associated with a greater displacement of Zn 2+ ions. The optical study showed a reduction in the band gap and a decrease in the crystalline quality due to the substitution of Cd 2+ in the ZnO lattice. Cadmium incorporation affected the morphology of the ZnO:Cd particles, changing the lengths and diameters of the ZnO rods; when the Cd concentration was increased, the ZnO rods shortened, forming coin-type hexagonal structures.R. E. Riman-contributing editor Manuscript No. 35528.

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Section: Introductionmentioning

confidence: 99%

Optical and Structural Properties of ZnO and ZnO:Cd Particles Grown by the Hydrothermal Method

2015

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“…The other peaks with lower intensity are observed at 331, 380, and 576 cm −1 , respectively. The peak at 331 cm −1 is caused by the vibration mode due to the multiple‐phonon scattering processes, 16,17 and the peaks at 380 and 576 cm −1 correspond to the transverse optical phonon and longitudinal optical phonon (LO) of the A 1 mode, respectively, where the LO A 1 mode is caused by the defects of oxygen vacancies 18,19 . Compared with the sample in air atmosphere, the peak at 576 cm −1 shifts to a higher wavenumber by 2 cm −1 for the sample in nitrogen atmosphere and by 7 cm −1 in hydrogen atmosphere.…”

Section: Resultsmentioning

confidence: 97%

Effect of Synthesis Atmosphere on the Microwave Dielectric Properties of ZnO Powders

Huang

Cao

et al. 2009

Journal of the American Ceramic Society

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ZnO powders were prepared via the solid-state reaction at 8001C in air, nitrogen, and hydrogen atmospheres, respectively. Raman spectra show that the concentration of oxygen vacancies greatly increases when the sample is prepared in hydrogen atmosphere. The particle size distributions of the powders prepared in air and nitrogen atmospheres are better than that in hydrogen atmosphere. The dielectric parameters of the samples were determined in the frequency range of 8. 2-12.4 GHz. Results show that the real part e 0 and imaginary part e 00 of complex permittivity of the sample prepared in hydrogen atmosphere reveal the greatest values in three samples. The loss mechanism of the samples was discussed.C. Bowen-contributing editor

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“…ZnO thin films have been prepared by various chemical and physical deposition techniques such as sputtering, pulsed laser ablation, successive ionic layer adsorption and reaction (SILAR) , Gao et al 2007, Jimenez-Gonzailez et al 1995, Kumar et al 2011, Lupan et al 2008, Shishiyanu et al 2005, Vargas-Hernandez et al 2008, sol-gel (Habibia and Sardashtia 2008, Jain et al 2007, Li et al 2005, chemical bath deposition (CBD) (Drici et al 2004, Miyazaki et al 2006, Yamada et al 2005, and chemical vapor deposition (CVD) (Sun et al 2008). Among them, the solution approached based on the chemical technique has attracted increasing attention in recent years owing to its relatively low temperature requirement, low cost, high reliability, and ability to deposit films over large areas.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and optical properties of ZnO thin films prepared by SILAR method with ethylene glycol

Lee¹,

Chang²,

Chang³

2013

Advances in nano research

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An ultrasonic-mediated assisted stepwise method has been developed for depositing transparent ZnO films from aqueous solution. Rinsing in low ethylene glycol temperature was easy to produce intermediate phase of Zn(OH) 2 , rinsing in 120°C ethylene glycol was observed the diffraction peak of intermediate Zn(OH) 2 in early report, the rinsing temperature plays an important role in the process of Zn(OH) 2 phase transformed to ZnO, high rinsing temperature actually improved the intermediate phase. However, the effect of rinsing on the intermediate phase is yet to be understood clearly. The effect of different rinsing procedures, involving either of or a combination of successive ionic layer adsorption and reaction (SILAR) and ultrasonic-assisted rinsing, prior to hydrolysis in ethylene glycol was investigated to deposit ZnO thin films. Ultrasonic-assisted rinsing process before hydrolysis in ethylene glycol was found to improve the occurrence Zn(OH) 2 in ZnO thin films. In the zinc complex ([ Zn(NH 3) 4 ] 2+) solution, excess ([ Zn(NH 3) 4 ] 2+) absorbed in glass substrate transformed incompletely to ZnO and exist as Zn(OH) 2 phase in thin films. In films deposited at low temperature, rinsing procedure is applied to improve excess Zn(OH) 2 and obtain smoother transparent thin films.

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Comparison of ZnO thin films deposited by three different SILAR processes

Cited by 25 publications

References 6 publications

Optical and Structural Properties of ZnO and ZnO:Cd Particles Grown by the Hydrothermal Method

Optical and Structural Properties of ZnO and ZnO:Cd Particles Grown by the Hydrothermal Method

Effect of Synthesis Atmosphere on the Microwave Dielectric Properties of ZnO Powders

Synthesis and optical properties of ZnO thin films prepared by SILAR method with ethylene glycol

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