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中南大学学报(英文版)

Journal of Central South University

Vol. 11    No. 2    June 2004

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Luminescent properties of BaO-La2O3-B2O3 glasses with dopant
SHI Peng-tu(石鹏途) 1, SHU Wan-gen(舒万艮) 1, LIAN Shi-xun(廉世勋)2,
L Xing-dong(吕兴栋) 1, LIU You-nian(刘又年)1

1.College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
2.College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China

Abstract:The luminescent properties of glasses synthesized in air atmosphere by conventional high temperature process were studied. The emissions spectra of Eu2+ and Eu3+ were observed in BaO-La2O3-B2O3-Eu2O3 glasses. The results show that the broad emission peaks at 430 nm correspond to 5d→4f emission transition of Eu2+, the sharp emission peaks at 592, 616, 650 and 750 nm correspond to5D0→7Fj(j=1-4) emission transition of Eu3+, respectively, which indi-cates that the BaO-La2O3-B2O3-Eu2O3 glass can convert ultraviolet and green components of sunlight into blue and red light so as to increase the intensity of blue and red light, respectively. The luminescent intensity of Eu2+ increases with increasing the molar ratio of Tb3+in BaO-La2O3-B2O3-Eu2O3-Tb4Oglasses, whereas the luminescent intensity of Eu3+ decreases. So the luminescent intensity of Eu(III, II) is influenced by Tb3+. These phenomena can be explained by elec-tron transfer mechanism: Eu3+(4f6)+Tb3+(4f8)→Eu2+(4f7)+Tb4+(4f7). Taking advantage of the luminescent prop-erties of BaO-La2O3-B2O3-Eu2O3 glasses, light-conversion glass for agriculture can be produced.

 

Key words: luminescent property; rare earth activated glass; light-conversion; BaO; La2O3; B2O3; Eu2O3

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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