Synthesis and characterization of hafnium oxide films for thermo and photoluminescence applications.
Hafnium oxide (HfO(2)) 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 degrees C. For substrate temperatures lower than 400 degrees C the deposited films were amorphous, while for substrate temperatures higher than 450 degrees C, the monoclinic phase of HfO(2) appeared. Scanning electron microscopy showed that the film's surface resulted rough with semi-spherical promontories. The films showed a chemical composition close to HfO(2), 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.
Mendoza
J Guzmán
JG
Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Instituto Politécnico Nacional, México DF, Mexico. joguzman@ipn.mx
Frutis
M A Aguilar
MA
Flores
G Alarcón
GA
Hipólito
M García
MG
Maciel Cerda
A
A
Azorín Nieto
J
J
Montalvo
T Rivera
TR
Falcony
C
C
D006195:Hafnium / Q000737:chemistry* / Q000528:radiation effects; D008163:Luminescent Measurements / Q000379:methods*; D008567:Membranes, Artificial; D010087:Oxides / Q000737:chemistry* / Q000528:radiation effects; D013696:Temperature; D013817:Thermography / Q000379:methods*; D014466:Ultraviolet Rays
D008567:Membranes, Artificial; D010087:Oxides; C545179:hafnium oxide; D006195:Hafnium