Investigation of optical and electrical properties of lithium doped ZnO nano films

Investigation of undoped and lithium doped ZnO nano films deposited on glass substrates by sol-gel spin coating method have been carried out. The structural and morphological properties of the films with optimum post annealing temperature of 350 °C have been investigated using x-ray Diffractometer (XRD) and Field emission scanning electron microscopy (FESEM) respectively. The XRD spectrum reveals that all the synthesised samples have single crystal structure having strong intense peak oriented along (002) c-axis. Crystalline size of undoped and Li doped ZnO nano films were deduced to be 34.66 nm and 32.59 nm respectively. FESEM exhibits uniform chromosome type structure. Nano films show transmittance above 90% in the range of wavelength 350 nm to 800 nm. I–V characteristic shows linear and ohmic behaviour. (paper)