CHEN WEI, SONG JIAQING, and SU MIANCENG, 151Eu-MOSSBAUER SPECTRA AND XPS INVESTIGATION OF BaFBr: Eu PHOSPHOR, J. Univ. Sci. Technol. Beijing , 2(1995), No. 2, pp.97-103.
Cite this article as: CHEN WEI, SONG JIAQING, and SU MIANCENG, 151Eu-MOSSBAUER SPECTRA AND XPS INVESTIGATION OF BaFBr: Eu PHOSPHOR, J. Univ. Sci. Technol. Beijing , 2(1995), No. 2, pp.97-103.

151Eu-MOSSBAUER SPECTRA AND XPS INVESTIGATION OF BaFBr: Eu PHOSPHOR

  • 151Eu Mossbauer spectra of BaFBr:Eu phosphor are reported for the first time.The results show that f(Eu2+)<f(Eu3+) or <x2>Fu2+><x2>Fu3+,which indicates that the attraction between phonons and Eu2+ is stronger than that between phonons and Eu3+,this may cause a faster increase of f(Eu2+) vs f(Eu3+) when temperature decreases as observed in the experiments.It is also found from Mossbauer investigation that when temperature decreases,the relative content of Eu2+ decreases, while that of Eu3+ increases.The temperature dependent Mossbauer spectra provide evidence for electron exchange or hopping between Eu2+ or Eu3+ sites in BaFBr lattice. The Mossbauer results are discussed and compared with the results of XPS and Photoluminescence studies.
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