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EuKNaTaO5: crecimiento cristalino, estructura y propiedad de la fotoluminiscencia
Irina P Roof1, Mark D Smith, Sangmoon Park
1University of South Carolina, Department of Chemistry, 631 Sumter Street, Columbia, South Carolina 29208, USA.
Journal of the American Chemical Society
|March 12, 2009
Resumen
Los investigadores sintetizaron un nuevo material, el Tantalato de Sodio y Potasio de Europium (EuKNaTaO5), que muestra una emisión de luz naranja brillante sin ningún tipo de dopaje. Este tantalato de tierras raras sin dopaje exhibe luminiscencia intrínseca a temperatura ambiente.
Área de la Ciencia:
- Química del estado sólido.
- Ciencia de los materiales ciencia de los materiales.
- La luminiscencia es la luminiscencia.
Sus antecedentes:
- La luminiscencia a menudo se logra mediante el dopaje de materiales con elementos de tierras raras.
- Los materiales no dopados con luminiscencia intrínseca son muy buscados para aplicaciones específicas.
Objetivo del estudio:
- Para sintetizar y caracterizar un nuevo compuesto de tantalato.
- Para investigar las propiedades luminiscentes intrínsecas de este nuevo material.
- Para explorar el potencial de los compuestos de tierras raras sin dopaje para la luminiscencia.
Principales métodos:
- Crecimiento de un solo cristal de una fusión eutectica KOH/NaOH.
- Determinación de la estructura del tantalato sintetizado.
- Espectroscopia de fotoluminiscencia para analizar las propiedades de emisión.
Principales resultados:
- Síntesis exitosa y determinación de la estructura cristalina de EuKNaTaO5.5.
- Observación de la fotoluminiscencia de color naranja brillante a temperatura ambiente.
- Demostración de la luminiscencia intrínseca en un tantalato de tierras raras sin dopaje.
Conclusiones:
- EuKNaTaO5 es un nuevo tantalato con propiedades luminiscentes intrínsecas.
- El material exhibe una emisión de color naranja brillante sin la necesidad de dopaje.
- Este descubrimiento abre caminos para el desarrollo de nuevos materiales luminiscentes basados en compuestos de tierras raras no dopados.
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