Fluorescence of Eu3+ in Sodium Phosphotungstate Glasses

R. Reisfeld, H. Mack, A. Eisenberg, Y. Eckstein

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9 Scopus citations


Sodium phosphotungstate glasses of various ratios of P2O5/WO3 were doped by 1.0 weight per cent Eu3 +. Fluorescence spectra were measured on excitation to 394 and 464 nm. On excitation to 394 nm the ratio of 5D0 → 7F2/ 5Do →7F1 emissions and the amount of splitting of the 5Do → 7F1 transition are dependent on composition of the glass and conditions of glass preparation. It is concluded that two different types of Eu8 + sites exist in phosphotungstate glasses. One type is this in which Eu3+ is surrounded by phosphate and tungstate tetrahedra at random. In the other type, Eu3 + is incorporated into microcrystallites. It is shown that Eu3+ may serve as a spectroscopic probe for microphase separation. It is also suggested that phosphotungstate glasses doped by Eu3+ can substitute Eu3 +-doped tungstate crystals for fluorescence purposes.

Original languageEnglish
Pages (from-to)273-275
Number of pages3
JournalJournal of the Electrochemical Society
Issue number2
StatePublished - Feb 1975
Externally publishedYes


  • fluorescence probe for microphase separation
  • microcrystallites
  • microphase


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