Abstract
Hafnium oxide (HfO2) films were deposited by the ultrasonic spray pyrolysis process. The films were synthesized from hafnium chloride as raw material in deionized water as solvent and were deposited on corning glass substrates at temperatures from 300 to 600 °C. For substrate temperatures lower than 400 °C the deposited films were amorphous, while for substrate temperatures higher than 450 °C, the monoclinic phase of HfO2 appeared. Scanning electron microscopy showed that the film's surface resulted rough with semi-spherical promontories. The films showed a chemical composition close to HfO2, with an Hf/O ratio of about 0.5. UV radiation was used in order to achieve the thermoluminescent characterization of the films; the 240 nm wavelength induced the best response. In addition, preliminary photoluminescence spectra, as a function of the deposition temperatures, are shown.
Original language | English |
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Pages (from-to) | 696-699 |
Number of pages | 4 |
Journal | Applied Radiation and Isotopes |
Volume | 68 |
Issue number | 4-5 |
DOIs | |
State | Published - Apr 2010 |
Externally published | Yes |
Keywords
- Hafnium oxide films
- Spray pyrolysis
- UV radiation dosimetry