Date of Award


Degree Type


Degree Name

Master of Science




Dr. Tsun-Kong Sham

Second Advisor

Dr. Peter J. Simpson

Third Advisor

Dr. Lyudmila Goncharova


Optical properties of ZnO were studied using X-ray absorption fine structure (XAFS)5 X-ray emission optical luminescence (XEOL)5 and cathodoluminescence. A series of ZnO nanostuructures was grown by chemical vapour deposition in a horizontal tube furnace. Scanning electron microscope (SEM) images show that the morphology of nanostructures depends on fabrication condition (growth temperature, type of substrate, presence of catalyst, carrier gas, and partial concentration of oxygen and Zn vapour). ZnO sample optical luminescence spectra exhibit band gap emission and broad green defect emission. Branching ration oftwo peaks depends on the morphology of ZnO nanostuctures and the excitation conditions. Time resolved X-ray emission optical luminescence (TR-XEOL) shows that green emission has much longer decay life-time that band gap emission. ZnO nanostructure absorption spectra (in TEY and FLYdetection modes) are consistent in general with spectra from ZnO monocrystal, yet demonstrate morphology dependence.



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