The luminescent quantum efficiency of Cr3+ ions in co-doped crystals of LiNbO3: ZnO determined by simultaneous multiple-wavelength photoacoustic and luminescence experiments
In this paper, the luminescent quantum efficiency of Cr3+ ions in co-doped crystals of LiNbO3 : ZnO : Cr3+ is determined by using a method based on simultaneous multiple-wavelength measurement of photoacoustic and luminescence signal after pulsed laser excitation. The quantum efficiency found in thi...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2001 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/155322 |
| Acceso en línea: | http://hdl.handle.net/11336/155322 |
| Access Level: | acceso abierto |
| Palabra clave: | Photoacoustic spectroscopy Luminescent quantum efficiency Cr3+ LiNbO3 https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | In this paper, the luminescent quantum efficiency of Cr3+ ions in co-doped crystals of LiNbO3 : ZnO : Cr3+ is determined by using a method based on simultaneous multiple-wavelength measurement of photoacoustic and luminescence signal after pulsed laser excitation. The quantum efficiency found in this lattice was (10 4)%. This result was compared with the value found from the study of the lifetime in terms of the temperature of the luminescent levels involved. In this last case, two non-equivalent crystal sites were found for Cr3+ ions, and two fluorescence quantum yields were determined. After the estimation of the concentration of each site by electron paramagnetic resonance experiments, the averaged fluorescence quantum yield value was (9 2)% in agreement with the previous result. |
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