Near UV-Blue Excitable Green-Emitting Nanocrystalline Oxide
Joint Authors
Perea-López, N.
Hirata, G. A.
Rodríguez-García, C. E.
Source
Advances in Materials Science and Engineering
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-06-02
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
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 λ=616 nm when excited with λ=395 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 λ=500 nm, most likely produced by 4f65d1→4f7 electronic transitions in Eu2+.
This green-emitting phosphor has excitation band in the near UV-blue region (λ=300–450 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.
American Psychological Association (APA)
Rodríguez-García, C. E.& Perea-López, N.& Hirata, G. A.. 2011. Near UV-Blue Excitable Green-Emitting Nanocrystalline Oxide. Advances in Materials Science and Engineering،Vol. 2011, no. 2011, pp.1-7.
https://search.emarefa.net/detail/BIM-498301
Modern Language Association (MLA)
Rodríguez-García, C. E.…[et al.]. Near UV-Blue Excitable Green-Emitting Nanocrystalline Oxide. Advances in Materials Science and Engineering No. 2011 (2011), pp.1-7.
https://search.emarefa.net/detail/BIM-498301
American Medical Association (AMA)
Rodríguez-García, C. E.& Perea-López, N.& Hirata, G. A.. Near UV-Blue Excitable Green-Emitting Nanocrystalline Oxide. Advances in Materials Science and Engineering. 2011. Vol. 2011, no. 2011, pp.1-7.
https://search.emarefa.net/detail/BIM-498301
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-498301