Scanning electron microscope, X-ray diffraction and photoluminescence measurements
were conducted on Be(x)Zn(1−x)O nanowires prepared by electrochemical and hydrothermal
deposition to study their morphology, structure and optical properties. The bowing
parameter for nanowires prepared by electrochemical and hydrothermal deposition was
found to be 4.8 eV and 3.6 eV, respectively. It was observed that for electrochemical deposition,
it is more difficult for Be(2+) to incorporate in the crystal lattice than Zn(2+). The electrochemical deposited samples exhibited stronger
deep level emissions, indicating a higher density of deep level states. A home-made Optically
Stimulated Luminescence (OSL) system was successfully constructed and calibrated
with Al2O3:C and BeO. The OSL lifetime measurements on electrochemical deposited
samples showed there were measurable OSL signals even on 500 nm long Be(x)Zn(1−x)O
nanowires. The lifetimes of these OSL signals were found to decrease with increasing Be
concentration. Be(x)Zn(1−x)O nanowires show considerable promise as new OSL materials.
| Identifer | oai:union.ndltd.org:TORONTO/oai:tspace.library.utoronto.ca:1807/33649 |
| Date | 28 November 2012 |
| Creators | Xu, Xiaofeng |
| Contributors | Ruda, Harry E. |
| Source Sets | University of Toronto |
| Language | en_ca |
| Detected Language | English |
| Type | Thesis |
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