Photoluminescence study of thermally deposited ZnO nanostructures

Shyam L Gupta and Raj K Thareja

Abstract

We report the synthesis of various nanostructures of ZnO using thermal evaporation technique. Morphology and stoichiometry of the prepared samples show a strong dependence on their synthesis temperatures. The photoluminescence of various nanostructures using fourth harmonic of Nd:YAG laser at 266 nm with pulse width of 4 ns is reported at low temperature in the range ~ 6–300 K. The observed photoluminescence spectra show dependence on morphological properties of the nanostructures. ZnO nanostructures grown at low temperature are observed to be defect free