Parametric study of seed-layer-assisted electrochemical growth of high-quality ZnMgO thin films on ZnO-coated FTO substrates: effect of seed layers thickness

Autor: Rania Kara, Rachid Siab
Rok vydání: 2021
Předmět:
Zdroj: Applied Physics A. 127
ISSN: 1432-0630
0947-8396
DOI: 10.1007/s00339-021-04932-9
Popis: A seed-layer-assisted electrochemical deposition method has been developed to create high-quality ZnMgO thin films on ZnO seed-layer-coated fluorine-doped indium oxide (FTO) glass substrates. The effects of seed layers thickness on the electrochemical, morphological, structural, optical, and electrical properties of the electrodeposited films were investigated. The electrochemical characterization by Mott–Schottky and impedance spectroscopy showed a significant improvement in the charges carrier concentration and interfacial charge transfer resistance for ZnO seed-layer-assisted ZnMgO thin films. X-ray diffraction analysis indicated that the prepared samples were of polycrystalline nature with a highly wurtzite ZnO (002)-oriented crystallites. Furthermore, the surface texturing and smoothness of ZnMgO/ZnO/FTO thin films were greatly improved with the increase in the ZnO seed layers thickness. The optical measurements showed the enhancement of the optical transmittance for ZnMgO layers deposited with thick seeds. Current–voltage characteristics of Au/ZnMgO/ZnO/FTO samples showed high electrical performance by the inclusion of seed layers approach.
Databáze: OpenAIRE
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