Paper
Influence of Concentration on Structural and Optical Characteristics of Nanocrystalline ZnO Thin Films Synthesized by Sol-Gel Dip Coating Method
- Authors:
- C. Amutha; B. Lawrence; K. Kulathuraan; V. Ramadas; B. Natarajan; A. Dhanalakshmi
- Abstract
- Zinc Oxide thin films (ZnO) were deposited successfully on glass substrate by sol-gel dip coating method by varying precursor concentrations. The structural properties of ZnO thin films were investigated by X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM) techniques. The optical properties of ZnO thin films were also characterised using UV visible Spectrophotometer, Fourier Transform Infrared Spectrometer (FTIR) and Photoluminescence (PL) studies. The XRD analysis of all ZnO films showed hexagonal structure with c-axis orientation along (002) plane, whereas SEM image of ZnO thin films showed granular surface. The UV visible spectral study showed a higher transmittance in the visible region with a direct band gap value in the range of 3.2 eV to 3.3 eV for prepared Zinc Oxide thin films. FTIR spectra indicated a ZnO stretching mode at 480 cm-1. The PL spectra of ZnO sample gave an intense visible strongest ultraviolet emission peak centred at 380 nm and weak blue emission peak around 480 nm.
- Keywords
- ZnO; Sol-gel Method; XRD; SEM; Optical; FTIR
- StartPage
- 13
- EndPage
- 18
- Doi