The luminescent quantum efficiency of $latex Cr ^{3+}$ ions in co-doped crystals of $latex LiNbO_ {3} : ZnO$ determined by simultaneous multiple-wavelength photoacoustic and luminescence experiments
In this paper, the luminescent quantum efficiency of $latex Cr ^{3+}$ ions in co-doped crystals of $latex LiNbO_{3} : ZnO : Cr ^{3+}$ is determined by using a method based on simultaneous multiple-wavelength measurement of photoacoustic and luminescence signal after pulsed laser excitation. The quan...
| Autores: | ; ; ; ; |
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| Tipo de documento: | Artículo |
| Estado: | Submitted version |
| Fecha de publicación: | 2001 |
| País: | Argentina |
| Institución: | CICBA |
| Repositorio: | CIC Digital (CICBA) |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:digital.cic.gba.gob.ar:11746/548 |
| Acceso en línea: | https://digital.cic.gba.gob.ar/handle/11746/548 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | Ciencias Físicas luminescent quantum efficiency photoacoustic spectroscopy chromium (III) Lithium niobate Zinc oxide |
| Sumario: | In this paper, the luminescent quantum efficiency of $latex Cr ^{3+}$ ions in co-doped crystals of $latex LiNbO_{3} : ZnO : Cr ^{3+}$ 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 $latex Cr^{3+}$ 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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