Optical Characterization of Tb3+:BaHfO3 Thin Films by Means of Photoacoustic Spectroscopy
| Autor: | Víctor Manuel Suárez Quezada, J. B. Rojas-Trigos, U. Nogal, Yolanda Jiménez Flores |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Photoluminescence Materials science Band gap business.industry chemistry.chemical_element Terbium Heterojunction 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences chemistry 0103 physical sciences Optoelectronics Direct and indirect band gaps Emission spectrum 0210 nano-technology business Spectroscopy Photoacoustic spectroscopy |
| Zdroj: | International Journal of Thermophysics. 39 |
| ISSN: | 1572-9567 0195-928X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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