Paper Title:
Preparation and Characteristics of Eu and Dy Doped Sr4Al14O25 Phosphor
  Abstract

Sr4Al14O25:Eu2+, Dy3+ long persistent phosphors with different B, Eu and Dy contents were prepared by solid phase reaction at various temperatures in H2/N2=1/9 atmosphere. X- ray diffraction and scanning electron microscopy observations showed that, when the phosphor was doped with 40 at% B, single dense Sr4Al14O25 phase was formed but for the samples with less than 40 at% B, mixed phases containing SrAl12O19 and SrAl2O4 were observed while for higher B content (100 at%) SrAl2B2O7 phases appeared. The phosphor showed emission peak centered at 500 nm with blue green color. When 40 at% of H3BO3 was added and doped with 4 at% of Eu and 8 at% of Dy, it showed the maximum initial intensity of 3170 mcd.m-2 and the longest persistency which is greater than 20 h over value of 5 mcd.m-2.

  Info
Periodical
Edited by
Byungsei Jun, Hyungsun Kim, Chanwon Lee, Soo Wohn Lee
Pages
249-252
DOI
10.4028/www.scientific.net/MSF.569.249
Citation
H. N. Luitel, T. Watari, T. Torikai, M. Yada, "Preparation and Characteristics of Eu and Dy Doped Sr4Al14O25 Phosphor", Materials Science Forum, Vol. 569, pp. 249-252, 2008
Online since
January 2008
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$32.00
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