Generation of wide color gamut visible light in NIR-excited thulium-holmium-ytterbium codoped tantalum oxide nanopowders

Artur S. Gouveia-Neto; Luciano A. Bueno; Ernande B. Costa; Elias A. Silva Jr.; Jefferson L. Ferrari; Karmel O. Lima; Rogéria R. Gonçalves

doi:10.1117/12.838866

25 February 2010 Generation of wide color gamut visible light in NIR-excited thulium-holmium-ytterbium codoped tantalum oxide nanopowders

Artur S. Gouveia-Neto, Luciano A. Bueno, Ernande B. Costa, Elias A. Silva Jr., Jefferson L. Ferrari, Karmel O. Lima, Rogéria R. Gonçalves

Author Affiliations +

Proceedings Volume 7598, Optical Components and Materials VII; 759806 (2010) https://doi.org/10.1117/12.838866
Event: SPIE OPTO, 2010, San Francisco, California, United States

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.

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Artur S. Gouveia-Neto, Luciano A. Bueno, Ernande B. Costa, Elias A. Silva Jr., Jefferson L. Ferrari, Karmel O. Lima, and Rogéria R. Gonçalves "Generation of wide color gamut visible light in NIR-excited thulium-holmium-ytterbium codoped tantalum oxide nanopowders", Proc. SPIE 7598, Optical Components and Materials VII, 759806 (25 February 2010); https://doi.org/10.1117/12.838866

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