Phase stabilization and optical response in the ultraviolet range, due to terbium concentration in hafnium oxide nanoparticles

• Published in: Applied radiation and isotopes 2023-10, Vol.200, p.110963-110963, Article 110963
• Main Authors: Montes, E., Guzmán-Olguín, J.C., Falcony Guajardo, C., Guzmán Mendoza, J.
• Format: Article
• Language: English
• Subjects: Hafnium oxide; Hydrothermal synthesis; m-HfO2; Photoluminescence; t-HfO2
• ISSN: 0969-8043; 1872-9800
• DOI: 10.1016/j.apradiso.2023.110963

This work reports the influence of terbium trivalent ions on growing kinetics and the phase in hafnium oxide nanoparticles, as well as response to radiation in the range from 256 to 286. The nanoparticles were obtained by the hydrothermal route maintaining the temperature constant and varying the reaction time and the terbium concentration. The results show a gradual change in the phase with the concentration of terbium trivalent ions, going from the monoclinic phase, present at low concentrations, to the tetragonal phase, which appears from dopant concentrations greater than 5% at., increasing in amount with concentration of dopant. These phases appear as two perfectly defined morphologies. Furthermore, there is a significant change in radiative lifetimes when the tetragonal phase appears. •Temperature and dopant determine the appearance of the tetragonal phase.•The appearance of a second phase influences the response to ultraviolet radiation.•The photoluminescent emission is grouped into dopant percentage intervals.•The material presents a redshift with the concentration of the dopant.