Au doping of CdS polycrystalline films prepared by co-sputtering of CdS–Cd-Au targets

Becerril, M.; Silva-López, H.; Zelaya-Ángel, O.; Vargas-Garcı́a, J.R.

doi:10.47566/2012_syv25_1-040214

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…Enhanced structural modifications stimulated by Ag ion doping have been shown to increase the photoluminescence intensity of CdS thin films [22,23]. Very interesting results, such as the energy dependence of the bandgap width and the conductivity values dependent on the concentration of the Au dopant, have been reported previously, but with different CdS synthesis techniques [24,25]. Enhanced photocurrent generation under visible electromagnetic radiation has been previously reported from the interaction of Au nanoparticles (NPs) with CBD-CdS thin films [26].…”

Section: Introductionmentioning

confidence: 90%

Characterization of Enhanced Crystalline Structures of CdS Thin Films Deposited by Chemical Bath Deposition Caused by Doping with (Cu2+, Ag+, Au+) Transition Metal Ions

Contreras-Rascón,

Díaz-Reyes,

Flores-Pacheco

et al. 2023

JNanoR

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In this work, the optical and structural properties of the modified crystalline structures of the nanostructured cadmium sulphide (CdS) semiconductor caused by doping with (Cu2+, Ag+, Au+) transition metal ions are studied. Using the chemical bath deposition technique, thin CdS films of good crystalline quality were deposited, which were doped in synthesis without the need for additional steps, obtaining thicknesses of around 100 nm. The chemical binding energies and their interactions of the CdS semiconductor compound with the different transition metal ions were determined by X-ray photoelectron spectroscopy. The crystalline and quality phase of the CBD-CdS thin films were determined by X-ray diffraction that were confirmed by Raman scattering, obtaining that the dominant crystalline phase is zinc blende in the (1 1 1) crystalline direction. A change in crystalline quality from monocrystalline to polycrystalline was observed by XRD in the CdS thin films doped with transition metal ions, keeping the crystalline direction (1 1 1) of the zinc blende phase of CdS as the dominant one; this crystalline behaviour was confirmed by HRTEM micrographs, in addition to the different levels of quantum confinement favoured by each transition metal incorporated into the CdS. By Raman scattering measurements, the crystalline zinc blende phase of CdS was confirmed and also allowed the analysis of the phononic interactions of the binary compound, where Raman shifts provided information on the structural quality and also confirm the effects of quantum confinement. UV-visible optical spectroscopy describes the effects of the crystalline structural modifications with blue shifts on the optical band gap energies of the evaluated CdS samples, related with the different levels of quantum confinement given by the (Cu2+, Ag+, Au+) transition metal dopants.

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Section: Introductionmentioning

confidence: 90%

Characterization of Enhanced Crystalline Structures of CdS Thin Films Deposited by Chemical Bath Deposition Caused by Doping with (Cu2+, Ag+, Au+) Transition Metal Ions

Contreras-Rascón,

Díaz-Reyes,

Flores-Pacheco

et al. 2023

JNanoR

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“…The influence of pH, solubility of (H 2 S) and CO 2 are considered in the interval of temperature deposited, and the influence of last in the reaction. [13]. Au doped CdS polycrystalline films were grown on Corning glass substrates at room temperature by co-sputtering from a CdS-Cd-Au target.…”

Section: Preparation Of Cd1-xmnxte Samples By Radiofrequency Sputtering (In Spanish)mentioning

confidence: 99%

In memoriam. Orlando Zelaya-Angel’s contributions in Superficies y Vacío

Santana-Aranda

2021

Superficies y Vacio

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Professor Orlando Zelaya Angel was an outstanding member of the research community on Solid State Physics. He served as President to the Sociedad Mexicana de Ciencia de Superficies y Vacío (SMCSyV; currently Sociedad Mexicana de Ciencia y Tecnología de Superficies y Materiales – SMCTSM), for the period 1995-1996. Professor Zelaya formed many researchers in Mexico, who continue developing research, either in Mexico, in their countries of origin, or abroad. Throughout the evolution of Superficies y Vacío, Professor Zelaya, contributed with sixteen articles on subjects ranging from thin films for optoelectronic applications, through hard coatings and studies on the process for production of Tortillas; covering most of his research areas of interest. Here is a subject-chronological compilation of the abstracts to his articles in Superficies y Vacío, after a year of his departure.

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“…In order to determine the optical bandgap energy of the films, we computed the first derivative of optical transmittance (dT/dE) and plotted it as a function of the energy (E) as depicted in Fig 4 (c). The position of the peak has been used to estimate the bandgap energy of synthesized films [25]. In this figure, the peak, at (3.20 eV), is due to the electronic transitions which correspond to the fundamental absorption of ZnO-semiconductor.…”

Section: Optical Analysismentioning

confidence: 99%

Effect of Transition Metals on the Mechanical Properties of ZnO Thin Films, Prepared by Sol-Gel Method

Benzitouni

Zaabat

Ebothé

et al. 2020

JNanoR

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Undoped and transition metals (TM = Cr, Ni, Mn and Cd) doped zinc oxide (ZnO) thin films were prepared by sol-gel dip-coating method on glass substrates at 300 °C. In this study, the effect of dopant material on the structural, morphological, optical, electrical and mechanical properties of ZnO thin films is investigated by using XRD, AFM, UV-Vis, Hall effect and nanoindentation techniques, respectively. Nanocrystalline films with a ZnO hexagonal wurtzite structure and two preferred orientations (002) and (103) were obtained. UV-Vis transmittance spectra showed that all the films are highly transparent in the visible region (> 80 %). Moreover, the optical band gap of the films decreased to 3.13 eV with an increasing orbital occupation number of 3d electrons. AFM-topography shows that the films are dense, smooth and uniform, except for the high roughness RMS =26.3 nm obtained for Cd-doped ZnO. Finally, the dopant material is found to have a significant effect on the mechanical behavior of ZnO as compared to the undoped material. For Ni and Cd dopants, analysis of load and unload data yields an increase in the hardness (8.96 ± 0.22 GPa) and Young’s modulus (122 ± 7.46 GPa) of ZnO as compared to Cr and Mn dopants. Therefore, Ni and Cd are the appropriate dopants for the design and application of ZnO-based nanoelectromechanical systems.

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Au doping of CdS polycrystalline films prepared by co-sputtering of CdS–Cd-Au targets

Cited by 8 publications

References 20 publications

Characterization of Enhanced Crystalline Structures of CdS Thin Films Deposited by Chemical Bath Deposition Caused by Doping with (Cu<sup>2+</sup>, Ag<sup>+</sup>, Au<sup>+</sup>) Transition Metal Ions

Characterization of Enhanced Crystalline Structures of CdS Thin Films Deposited by Chemical Bath Deposition Caused by Doping with (Cu<sup>2+</sup>, Ag<sup>+</sup>, Au<sup>+</sup>) Transition Metal Ions

In memoriam. Orlando Zelaya-Angel’s contributions in Superficies y Vacío

Effect of Transition Metals on the Mechanical Properties of ZnO Thin Films, Prepared by Sol-Gel Method

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