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Proceedings Paper

Intense red upconversion fluorescence emission in NIR-excited erbium-ytterbium doped laponite-derived phosphor
Author(s): Andréa F. da Silva; Diógenes S. Moura; Artur S. Gouveia-Neto; Elias A. Silva; Luciano A. Bueno; Ernande B. Costa; Eduardo N. Azevedo
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Paper Abstract

In this report the optical properties and energy-transfer frequency upconversion luminescence of Er3+/Yb3+-codoped laponite-derived powders under 975 nm infrared excitation is investigated. The 75%(laponite):25%(PbF2) samples doped with erbium and ytterbium ions, generated high intensity red emission around 660 nm and lower intensity green emission around 525, and 545 nm. The observed emission signals were examined as a function of the excitation power and annealing temperature. The results indicate that energy-transfer, and excited-state absorption are the major upconversion excitation mechanism for the erbium excited-state red emitting level. The precursor glass samples were also heat treated at annealing temperatures of 300 °C, 400 °C, 500 °C, and 600 °C, for a 2h period. The dependence of the visible upconversion luminescence emission upon the annealing temperature indicated the existence of an optimum temperature which leads to the generation of the most intense and spectrally pure red emission signal.

Paper Details

Date Published: 16 February 2011
PDF: 6 pages
Proc. SPIE 7912, Solid State Lasers XX: Technology and Devices, 79122G (16 February 2011); doi: 10.1117/12.872761
Show Author Affiliations
Andréa F. da Silva, Univ. Federal Rural de Pernambuco (Brazil)
Diógenes S. Moura, Univ. Federal Rural de Pernambuco (Brazil)
Artur S. Gouveia-Neto, Univ. Federal Rural de Pernambuco (Brazil)
Elias A. Silva, Univ. Federal Rural de Pernambuco (Brazil)
Luciano A. Bueno, Univ. Federal Rural de Pernambuco (Brazil)
Ernande B. Costa, Univ. Federal Rural de Pernambuco (Brazil)
Eduardo N. Azevedo, Ministério da Ciência e Tecnologia (Brazil)


Published in SPIE Proceedings Vol. 7912:
Solid State Lasers XX: Technology and Devices
W. Andrew Clarkson; Norman Hodgson; Ramesh Shori, Editor(s)

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