Effect of the pH on the physical properties of ZnO:In thin films deposited by spray pyrolysis

Maldonado, A.; Asomoza, R.; Cañetas-Ortega, J.; Zironi, Elisa; Hernández, René; Patiño, Rodrigo; Solorza‐Feria, O.

doi:10.1016/s0927-0248(98)00170-6

Cited by 46 publications

(33 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According with this method of generalized species and equilibrium, the stability constants reported at room temperature [3] were used to detect the chemical zone in which Cd(NH 3 ) 2+ 4 predominates as an approximation to the conditions at the temperature of deposition. More details to obtain this diagram are found elsewhere [6]. Thus, Fig.…”

Section: +mentioning

confidence: 99%

Analysis of the chemical bath and its effect on the physical properties of CdS/ITO thin films

Herrera¹,

Ramos²,

Patiño³

et al. 2006

Braz. J. Phys.

View full text Add to dashboard Cite

Cadmium sulphide (CdS) thin films deposited on indium tin oxide (ITO) substrates were prepared by the chemical bath deposition technique at different values of pH and pNH 3 . This was made in order to analyze the influence of the initial chemical composition of the bath on some physical properties of the final CdS films, used as optical windows for solar cells. The mechanism proposed in the literature for this deposition involves the tetra-ammonium cadmium (II) complex, Cd(NH 3 ) 2+ 4 , at the start of the reaction. Following this mechanism, the change in the concentration of Cd(NH 3 ) 2+ 4 gives a variation in the rate of deposition with the corresponding modification in the quality of the film. Therefore, the predominance zone diagram of Cd 2+ species in solution as a function of the values of pH and pNH 3 was used to analyze the reasons why the CdS/ITO thin films are favored in just a narrow range of ammonium and hydroxide concentrations. To obtain useful films, the results showed that low ammonium concentrations must be avoided at high pH values as well as high ammonium concentrations at lower pH values.

show abstract

Section: +mentioning

confidence: 99%

Analysis of the chemical bath and its effect on the physical properties of CdS/ITO thin films

Herrera¹,

Ramos²,

Patiño³

et al. 2006

Braz. J. Phys.

View full text Add to dashboard Cite

show abstract

“…ZnO is a II-VI n-type semiconductor showing a hexagonal wurtzite structure and a wide band gap of about 3.37 eV at room temperature. Doping of ZnO films with B, Al, Ga, In, or F elements has been used to improve the material electrical properties and stability [5][6][7][8]. Moreover, rareearth-doped ZnO films have also been researched [9,10].…”

Section: Introductionmentioning

confidence: 99%

Temperature-dependent growth of zinc oxide thin films grown by metal organic chemical vapor deposition

Chen

Geng

Xue

et al. 2006

Journal of Crystal Growth

View full text Add to dashboard Cite

“…33 Their experimental results showed that the heating rate of the preheating process robustly affected the surface morphology and transparency of the film. The effect of pH (logarithmic measure of hydrogen ion concentration) value on the optical, electrical and structural properties of polycrystalline ZnO thin films, grown by spray pyrolysis technique at temperatures below 500 • C at different PH values for starting solutions, has been reported by Maldonado et al 34 It was shown that the pH values have a great influence on the physical properties of ZnO thin films grown by this technique.…”

Section: Fractal Analysis Of Zno Thin Filmsmentioning

confidence: 85%

Zinc Oxide Thin Films Characterization, AFM, XRD and X-ray Reflectivity

2016

View full text Add to dashboard Cite

In this study, surface structures of two zinc oxide (ZnO) thin films, prepared by sol-gel spin and dip-coating methods, were investigated. Ex situ Atomic Force Microscopy (AFM), X-ray diffraction (XRD), and X-ray reflectivity measurements were carried out in order to study the surface structure. XRD measurements showed nanostructured ZnO thin films with well-defined orientations. Fractal analysis was applied on the AFM data to illustrate the surface morphology of thin films. Fractal analysis provided a precious depiction of irregularities found in ZnO thin films and revealed that both interface width W and lateral correlation length ξ are strongly affected by coating method. Calculations showed that the film that was prepared by dip-coating had correlation length, interface width and fractal dimension of 56.2, 2.3, and 2.2 nm, respectively. These parameters for spin-coated sample were 354.8, 8.5, and 2.64 nm, respectively. Optimization of X-ray reflectivity by Genetic Algorithm optimization revealed structural parameters of thin films such as surface and interface roughness and thickness of the films. These calculations showed that dip-coated thin film has a smooth surface, whereas spin-coated thin film has a rough surface.

show abstract

Effect of the pH on the physical properties of ZnO:In thin films deposited by spray pyrolysis

Cited by 46 publications

References 26 publications

Analysis of the chemical bath and its effect on the physical properties of CdS/ITO thin films

Analysis of the chemical bath and its effect on the physical properties of CdS/ITO thin films

Temperature-dependent growth of zinc oxide thin films grown by metal organic chemical vapor deposition

Zinc Oxide Thin Films Characterization, AFM, XRD and X-ray Reflectivity

Contact Info

Product

Resources

About