Título
Near UV-blue excitable green-emitting nanocrystalline oxide
Autor
CARLOS EDUARDO RODRIGUEZ GARCIA
NESTOR PEREA LOPEZ
GUSTAVO ALONSO HIRATA FLORES
Nivel de Acceso
Acceso Abierto
Identificador alterno
doi: http://dx.doi.org/10.1155/2011/790517
Materias
Resumen o descripción
"Green-emitting Eu-activated powders were produced by a two-stage method consisting of pressure-assisted combustion synthesis and postannealing in ammonia. The as-synthesized powders exhibited a red photoluminescence (PL) peak located at nm when excited with nm UV. This emission peak corresponds to the 5D0→7F2 transition in Eu3+. After annealing in ammonia, the PL emission changed to an intense broad-band peak centered at nm, most likely produced by 4f65d1→4f7 electronic transitions in Eu2+. This green-emitting phosphor has excitation band in the near UV-blue region (–450 nm). X-ray diffraction analysis reveals mainly the orthorhombic EuAlO3 and Al2O3 phases. Transmission electron microscopy observations showed that the grains are formed by faceted nanocrystals (~4 nm) of polygonal shape. The excellent excitation and emission properties make these powders very promising to be used as phosphors in UV solid-state diodes coupled to activate white-emitting lamps."
Editor
Hindawi Publishing Corporation
Fecha de publicación
2011
Tipo de publicación
Artículo
Versión de la publicación
Versión publicada
Recurso de información
Formato
application/pdf
Idioma
Inglés
Audiencia
Público en general
Sugerencia de citación
C. E. Rodríguez-García, N. Perea-López, and G. A. Hirata. (2011). Near UV-Blue Excitable Green-Emitting Nanocrystalline Oxide. Advances in Materials Science and Engineering Volume 2011, Article ID 790517, http://dx.doi.org/10.1155/2011/790517
Repositorio Orígen
Repositorio IPICYT
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