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Effect of annealing temperature on the optical properties of electrodeposited ZnO/MgO superlattice
| Content Provider | Scilit |
|---|---|
| Author | Egwunyenga, N. J. Ezenwaka, L. N. Ezenwa, I. A. Okoli, Nonso Livinus |
| Copyright Year | 2019 |
| Description | Journal: Materials Research Express Superlattice of ZnO/MgO thin films were successfully synthesized on Fluorine doped Tin Oxide (FTO) glass substrates by means of electrodeposition technique from MgSO4.7H2O, citric acidic and NaOH. A Janway 6405 UV/visible spectrophotometer was used to obtain the spectra absorbance data. Optical properties of the films which include; transmittance, reflectance, energy band gap (Eg), refractive index (η), optical conductivity and extinction coefficient were studied. The surface morphology of the deposited films was also studied using Scanning Electron Microscopy (SEM). We studied the effects of annealing temperature on the optical properties of the deposited thin films. Our results indicate that absorbance decreased as annealing temperature of the films increased. Our results also suggest that the transmittance of the annealed thin films increased as the annealing temperature increased. Our result shows that annealing slightly increases the refractive index of the films, with approximately 2.60 in UV and VIS regions. Our result also suggests that annealing of the films increased the value of the refractive index. The annealing temperature was found to vary inversely with the optical conductivity of the films. The band gap energy between 2.70 eV and 3.02 eV was obtained for ZnO/MgO superlattices. Thickness of the deposited films ranges between 190 nm and 635 nm. Our result indicates that as temperature increased, thickness of the deposited ZnO/MgO superlattice decreased. |
| Related Links | https://iopscience.iop.org/article/10.1088/2053-1591/ab42ab/pdf |
| ISSN | 20531591 |
| e-ISSN | 20531591 |
| DOI | 10.1088/2053-1591/ab42ab |
| Journal | Materials Research Express |
| Issue Number | 10 |
| Volume Number | 6 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2019-09-09 |
| Access Restriction | Open |
| Subject Keyword | Journal: Materials Research Express Condensed Matter Physics Annealing Temperature Zno/mgo Superlattice |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Metals and Alloys Biomaterials Electronic, Optical and Magnetic Materials Polymers and Plastics |
