Zinc Oxide Nanorods Thin Films Research Articles

Synthesis and Characterization of Gadolinium Doped Zinc Oxide Nanorods Thin Films

ZnO nanorods (NRs) arrays were synthesized by chemical solution deposition (CSD) method on commercial glass substrate with ZnO thin film act as seed layer prepared by sol-gel spin coating. The effect of annealing temperature of 150°C, 250°C and 500°C, respectively, on the structural growth was investigated. The observation reveals the structural improvement as the annealing temperature increased. The influence of gadolinium doping to ZnO NRs arrays was explored upon the structural and optical features. The FESEM imaging along with XRD, AFM and UV-Vis analysis were conducted to dissect the information gained by performing a study case on various gadolinium doping content in the range of 1 at. % to 4 at. %. Based on the results, the correlation between the doping content were drawn in details in this paper.

ZnO nanostructure thin films by continuous spray pyrolysis using doped precursor for Si solar cell application

This work presents deposition of Zn solution seed layer assisted growth of zinc oxide (ZnO) nanostructure layers by continuous spray pyrolysis reactor using lanthanides (Er and Eu) and metal (Al) influenced zinc acetate precursor solution. Dopants in precursors have influenced structural property, surface morphology and optical reflectance of resulting ZnO thin films which are supported by X-ray diffractometer, scanning electron microscope and reflectance measurements. Enhanced dispersion amongst nanorods is observed under the influence of Er and Al dopant in ZnO thin film. The change of precursor from Zinc acetate to Titanium tetraisopropoxide for Er doped precursor is helping to achieve better crystalline ZnO nanorods arrangement with increased homogenous growth, which results into improved light reflectance reduction of thin film. The experimental evidences of light reflectance from ZnO nanorods on Si surface is studied with the help of FDTD based Lumerical software package which can be a useful study for designing ZnO nanorods thin film in device purposes. The utility of ZnO layer by this reactor on low efficiency Si solar cell is also explored in improving device efficiency via increase of photocurrent.

Influence of copper on the morphology and properties of one dimensional ZnO nanorod structures

Cu doped zinc oxide nanorod thin films have been prepared by simple sol–gel dip coating method. The X-ray diffraction pattern shows that the ZnO nanorod and Cu doped ZnO nanorod thin film samples exhibit hexagonal wurtzite structure. Scanning electron microscopy images revealed that the ZnO samples have aligned nanorod arrangement and Cu doped ZnO have bunch-like nanorod assembly. The energy dispersive X-ray (EDX) analysis confirmed the presence Cu in the ZnO thin films. The presence of functional groups and the chemical bonding has been studied using FTIR spectra. The photoluminescence spectra (PL) of the samples were recorded at room temperature. Ultraviolet emission peak and green emission peak were observed for the Cu doped ZnO samples.

Deployment of aligned ZnO nanorod with distinctive porous morphology: Potential scaffold for the detection of p-nitrophenylamine

The low temperature solution method was employed to synthesize aligned nanoporous zinc oxide (ZnO) nanorods (NRs) on fluorine doped tin oxide (FTO) glass and applied as an electron mediator for the fabrication of high-sensitive chemical sensor towards the detection of p-nitrophenylamine (p-NPA) in an aqueous medium. Well-crystalline ZnO nanorods with nanoporous morphology were arranged vertically on the FTO substrate. The aligned nanoporous ZnO NRs thin film presented the good aspect ratio of Zn and O elements in terms of atomic weight percentage. The cyclovoltametry and amperometry analysis deduced the rapid electrocatalytic activity of aligned nanoporous ZnO NRs electrode towards p-NPA chemical. The aligned nanoporous ZnO NRs electrode was used to fabricate p-NPA chemical sensor which showed significantly high and reproducible sensitivity of ∼184.26μAmM−1cm−2 with a short response time ≥8s. The fabricated p-NPA chemical sensor exhibited reasonable detection limit of ∼53.7μM and good linearity in the range of 5–20μM with the correlation efficient of R=∼0.97569.

Zinc Oxide Nanorods Characteristics Prepared by Sol-Gel Immersion Method Immersed at Different Times

This paper focus on zinc oxide (ZnO) nanorods prepared using sol-gel immersion method immersed at different time. Immersion times have been varied 1~24 hr and the characteristics of each sample have been observed. The effects of immersion time on ZnO nanorods thin films have been studied in surface morphology and structural properties using Scanning Electron Microscopy (SEM) and X-ray diffractometer (XRD), respectively.

Optical Properties of Al Doped Zinc Oxide Nanorods Thin Film Deposited by Immersion Technique

We investigated the effect of immersion time on optical, electrical properties and surface morphology of nanostructured Aluminium (Al) doped Zinc Oxide (ZnO) thin films prepared by immersion technique. UV-Vis-NIR spectra indicate that the transmittance of the samples decrease with immersion time. Electrical properties study reveals the nanostructured Al doped ZnO thin film at 1 hr shows the lowest resistivity compared to other samples. Surface morphology results as characterized by scanning electron microscope (SEM) show that the Al doped ZnO nanorods quantity increased with immersion time.