Concentration dependence of luminescence efficiency of Dy super(3) super(+) ions in strontium zinc phosphate glasses mixed with Pb sub(3)O sub(4)

In this work we synthesized SrO-ZnO-P sub(2)O sub(5) glasses mixed with Pb sub(3)O sub(4) (heavy metal oxide) and doped with different amounts of Dy sub(2)O sub(3) (0.1 to 1.0 mol%). Subsequently their emission and decay characteristics were investigated as a function of Dy sub(2)O sub(3) concentrat...

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Bibliographic Details
Published in:Luminescence (Chichester, England) England), 2017-02, Vol.32 (1), p.71-77
Main Authors: Kumar, Valluri Ravi, Giridhar, G, Veeraiah, N
Format: Article
Language:English
Subjects:
Efficiency
Emission analysis
Emission spectra
Glass
Luminescence
Parameters
Quantitative analysis
Quenching
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Summary:In this work we synthesized SrO-ZnO-P sub(2)O sub(5) glasses mixed with Pb sub(3)O sub(4) (heavy metal oxide) and doped with different amounts of Dy sub(2)O sub(3) (0.1 to 1.0 mol%). Subsequently their emission and decay characteristics were investigated as a function of Dy sub(2)O sub(3) concentration. The emission spectra exhibited three principal emission bands in the visible region corresponding to super(4)F sub(9) sub(/2) arrow right super(6)H sub(15) sub(/2) (482 nm), super(6)H sub(13) sub(/2 ) (574 nm) and super(6)H sub(11) sub(/2 ) (663 nm) transitions. With increase in the concentration of Dy sub(2)O sub(3) (upto 0.8 mol%) a considerable increase in the intensity of these bands was observed and, for further increase, quenching of photoluminescence (PL) output was observed. Using emission spectra, various radiative parameters were evaluated and all these parameters were found to increase with increase in Dy sub(2)O sub(3) concentration. The Y/B integral emission intensity ratio of Dy super(3) super(+) ions evaluated from these spectra exhibited a decreasing trend with increase in the Dy sub(2)O sub(3) concentration up to 0.8 mol%. Quenching of luminescence observed in the case of the glasses doped with 1.0 mol% is attributed to clustering of Dy super(3) super(+) ions. The quantitative analysis of these results together with infra-red (IR) spectral studies indicated that 0.8 mol% is the optimum concentration of Dy super(3) super(+) ions needed to achieve maximum luminescence efficiency.
ISSN:1522-7235
1522-7243
DOI:10.1002/bio.3150