Electrochemically deposited ZnO nanostructure on ZnO:V seeding layer

ZnO nanostructured (NS) arrays are grown by electrochemical method on conductive seeding layers of ZnO doped with V (ZnO: V) deposited by magnetron sputtering on glass substrates. The surface morphology of the ZnO NS is studied by Scanning Electron Microscopy. The spectra of transmittance, diffused and specular reflectance are measured for the ZnO NS arrays deposited for 30 and 60 min. and are compared to the corresponding spectra of the substrate with seeding ZnO: V film. The values of diffused reflection are higher than those of the seeding layers due to the grown of nanostructured ZnO arrays. Increasing of the diffused reflection with the time of electrochemical growth is observed and is explained by increasing size of the grains. The results show the possibility for deposition of nanostructured ZnO arrays on low cost ZnO: V seeding layers with large effective surface area that could be applied in thin film solar cells for increasing light harvesting.