Photoluminescence of Eu³⁺-doped glasses with Cu²⁺ impurities

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
José A Jiménez

Abstract

Glasses activated with Eu(3+) ions are attractive as luminescent materials for various photonic applications. Co-doping with copper has been proposed for enhancing material optical properties, but the quenching effect of Cu(2+) impurities on Eu(3+) emission in glass remains largely unexplored. In this work, Eu2O3/CuO-containing barium-phosphate glasses have been prepared by the melt-quench method, and the Eu(3+) photoluminescence (PL) quenching resulting from Eu(3+)→Cu(2+) energy transfer was evaluated. Optical absorption spectroscopy showed that with the increase in CuO concentration the Cu(2+) absorption band resonant with Eu(3+) emission (e.g. (5)D0→(7)F2 transition around 615 nm) developed steadily. As a result, Eu(3+) PL was progressively quenched. Evaluation of the quenching constants as a function of temperature in the 298-673K range showed differences basically within experimental error, consistent with a resonant transfer and lack of phonon-assisted processes. Moreover, analysis of the Eu(3+) emission decay dynamics revealed a strong correlation between the decay rates and Cu(2+) impurity levels. Results imply that for practical applications the levels of Cu(2+) in Eu(3+)/Cu(+)-activated glasses should be reduced if no...Continue Reading

References

Mar 24, 2004·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·K K MahatoAnita Rai
Nov 29, 2014·Physical Chemistry Chemical Physics : PCCP·Mariana SendovaNicholas Rudawski

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Citations

Feb 27, 2016·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·José A Jiménez
Jul 7, 2020·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·José A Jiménez, Brien Darley

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