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Proceedings Paper

Generation of wide color gamut visible light in NIR-excited thulium-holmium-ytterbium codoped tantalum oxide nanopowders
Author(s): Artur S. Gouveia-Neto; Luciano A. Bueno; Ernande B. Costa; Elias A. Silva; Jefferson L. Ferrari; Karmel O. Lima; Rogéria R. Gonçalves
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Paper Abstract

Multicolor visible light emitting NIR-excited Tm/Ho/Yb-codoped tantalum oxide nanopowders were produced using the sol-gel method. The generation of wide color gamut fluorescence in glass-ceramic with orthorhombic Ta2O5 nanocrystals dispersed into amorphous silica-based matrix is observed. The light emission spectroscopic properties of the rare-earth doped SiO2:Ta2O5 nanocomposites as a function of the tantalum content and temperature of annealing is examined. Simultaneously emitted multicolor fluorescence consisting of blue(480 nm), green(540 nm) and red(650 nm) upconversion signals in the SiO2:Ta2O5 system doped with holmium and thulium and sensitized with ytterbium, is demonstrated. It is also demonstrated that the proper choice of the rare-earth content and the NIR excitation power yielded the generation and control of the three primary colors and allows the emission of a balanced white overall luminescence from the glass-ceramic nanopowder samples.

Paper Details

Date Published: 26 February 2010
PDF: 7 pages
Proc. SPIE 7598, Optical Components and Materials VII, 759806 (26 February 2010); doi: 10.1117/12.838866
Show Author Affiliations
Artur S. Gouveia-Neto, Univ. Federal Rural de Pernambuco (Brazil)
Luciano A. Bueno, Univ. Federal Rural de Pernambuco (Brazil)
Ernande B. Costa, Univ. Federal Rural de Pernambuco (Brazil)
Elias A. Silva, Univ. Federal Rural de Pernambuco (Brazil)
Jefferson L. Ferrari, Univ. de São Paulo (Brazil)
Karmel O. Lima, Univ. de São Paulo (Brazil)
Rogéria R. Gonçalves, Univ. de São Paulo (Brazil)


Published in SPIE Proceedings Vol. 7598:
Optical Components and Materials VII
Shibin Jiang; Michel J. F. Digonnet; John W. Glesener; J. Christopher Dries, Editor(s)

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