A comparative study of physico-chemical properties of CBD and SILAR grown ZnO thin films

• Published in: Materials research bulletin Vol. 49; pp. 420 - 425
• Main Authors: Jambure, S.B., Patil, S.J., Deshpande, A.R., Lokhande, C.D.
• Format: Journal Article
• Language: English
• Published: United States Elsevier Ltd 01.01.2014
• Subjects: A. Oxides; A. Thin films; ADSORPTION; B. Chemical synthesis; CHEMICAL PROPERTIES; D. Electrical properties; D. Optical properties; DEPOSITION; DEPOSITS; ELECTRICAL PROPERTIES; GLASS; MATERIALS SCIENCE; NANOSCIENCE AND NANOTECHNOLOGY; NANOSTRUCTURES; OPTICAL PROPERTIES; SCANNING ELECTRON MICROSCOPY; SUBSTRATES; SYNTHESIS; THIN FILMS; X-RAY DIFFRACTION; ZINC OXIDES; B. Chemical synthesis; A. Thin films; A. Oxides; D. Optical properties; D. Electrical properties
• ISSN: 0025-5408; 1873-4227
• DOI: 10.1016/j.materresbull.2013.09.007

Schematic model indicating ZnO nanorods by CBD (Z1) and nanograins by SILAR (Z2). •Simple methods for the synthesis of ZnO thin films.•Comparative study of physico-chemical properties of ZnO thin films prepared by CBD and SILAR methods.•CBD outperforms SILAR method. In the present work, nanocrystalline zinc oxide (ZnO) thin films have been successfully deposited onto glass substrates by simple and economical chemical bath deposition (CBD) and successive ionic layer adsorption reaction (SILAR) methods. These films were further characterized for their structural, optical, surface morphological and wettability properties. The X-ray diffraction (XRD) patterns for both CBD and SILAR deposited ZnO thin films reveal the highly crystalline hexagonal wurtzite structure. From optical studies, band gaps obtained are 2.9 and 3.0eV for CBD and SILAR deposited thin films, respectively. The scanning electron microscope (SEM) patterns show growth of well defined randomly oriented nanorods and nanograins on the CBD and SILAR deposited samples, respectively. The resistivity of CBD deposited films (102Ωcm) is lower than that of SILAR deposited films (105Ωcm). Surface wettability studies show hydrophobic nature for both films. From the above results it can be concluded that CBD grown ZnO thin films show better properties as compared to SILAR method.