Optical and electrical properties of ZnO nanorods at different temperatures

Here ZnO (Zinc Oxide) nanorods are synthesized by using hydrothermal process. ZnO nanorods were synthesized on annealed seeded layer by hydrothermal method at different temperatures 50°C, 65°C, 75°C, and 85°C. Optical and electrical properties were studied using Diffused Reflectance Spectra analyser (DRS) and current-voltage measurements are done on the prepared ZnO nanorods thin films. Diffused reflectance occurs when the incident radiation beam is focused on the sample at a particular temperature and the surface of the sample is rough or irregular so that a part of the incident beam is reflected which is considered to be diffuse reflection. Then the back reflected and diffusely scattered light is collected by the detector. The UV spectra analyser shows the absorption peaks appear at 366nm, 367nm, 366nm and 369nm while growth temperature increases from 50 °C to 85 °C. Band Gap energy of the sample is also calculated at different temperatures. ZnO nanorods have huge applications in nanotechnology. (author)