Optical Characterization of Tb3+:BaHfO3 Thin Films by Means of Photoacoustic Spectroscopy

  • Yolanda Jiménez Flores
  • Uriel Nogal
  • Víctor Manuel Suárez Quezada
  • José Bruno Rojas-Trigos
Part of the following topical collections:
  1. ICPPP-19: Selected Papers of the 19th International Conference on Photoacoustic and Photothermal Phenomena


In this work, the synthesis and optical characterization of Al2O3/Tb3+:BaHfO3/Al2O3 heterostructure, grown by ultrasonic spray pyrolysis technique are reported. The X-ray diffraction patterns corroborate that the scintillator layer structure corresponds to perovskite structure, while the elemental chemical composition of it is close to the optimal stoichiometry, but showing barium vacancies. The empirical determination of the optical bandgap energy, achieved by means of the photoacoustic spectroscopy technique, set a principal direct band gap in 3.8 eV, but evidencing the existence of a larger indirect bandgap also. The photoluminescent spectroscopy measurements show that the heterostructure has an intense fluorescent response, congruent to the principal emission lines of trivalent terbium, as was intended to.


BaHfO3 Optical characterization Photoacoustic spectroscopy Scintillator Thin films 



The authors acknowledge 2015003 and 20164786 SIP projects and its financial support.


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Authors and Affiliations

  1. 1.Instituto Politécnico NacionalCICATA-LegariaMéxicoMéxico
  2. 2.Cátedras CONACYT, Instituto Politécnico NacionalCICATA-LegariaMéxicoMéxico
  3. 3.Departamento de Química, Cátedras CONACYTUniversidad Autónoma Metropolitana-IztapalapaMéxicoMéxico

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