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Pramana

, Volume 47, Issue 6, pp 471–479 | Cite as

Energy transfer in CaSiO3 phosphors doped with Ce3+ and Tb3+

  • R V Subrahmanyam
  • Shishir Jain
  • Ashish Verma
  • S Sivaraman
Article

Abstract

Calcium metasilicate phosphors activated by Ce3+ and Tb3+ have been studied for their emission characteristics. In two series of phosphors, one activator was kept at its optimum value while the other was varied. In another two series, one activator was kept below its optimum value and the other was varied. Concentration quenching effects start when each activator gives its maximum emission. There is clear evidence of an energy transfer from Ce3+ to Tb3+ because the5 D 3 lines appear on addition of Ce3+ while they were conspicuously absent when Tb3+ alone was present. Their absence in singly activated phosphors could not have been due to cross-relaxation. Obviously X-ray excitation does not lead to5 D 3 transitions which are achieved only by energy transfer. Further, considering the features of the emission spectra and the concentrations of activators used, the transfer could only be of the dipole-dipole type.

Keywords

Energy transfer phosphors 
PACS No. 

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References

  1. [1]
    P Victor Kelsey Jr and J J Brown Jr,J. Electrochem. Soc. 123, 184–85 (1976)CrossRefGoogle Scholar
  2. [2]
    A M Srivastav,J. Electrochem. Soc. 137, 2959 (1990)CrossRefGoogle Scholar
  3. [3]
    R Reisfeld and J Hormadaly,J. Solid State Chem. 13, 283 (1975)CrossRefADSGoogle Scholar
  4. [4]
    J Holsa, M Leskela and L Miinisto,J. Solid State Chem. 37, 267 (1981)CrossRefGoogle Scholar
  5. [5]
    J G Rabatin,U.S. Pat. 3, 617, 743 (1971)Google Scholar
  6. [6]
    K Nomota and R Kubo,Jpn. Kokai 76, 378 (1976)Google Scholar
  7. [7]
    D L Dexter,J. Chem. Phys. 21, 826 (1953)CrossRefADSGoogle Scholar
  8. [8]
    S Asano, N Yamashita and T Ohnishi,Phys. Status Solidi B99, 661 (1980)CrossRefGoogle Scholar
  9. [9]
    T Hoshina,J. Phys. Soc. Jpn. 48, 1261 (1980)CrossRefADSGoogle Scholar
  10. [10]
    Ravindra Pandey and S Sivaraman,J. Phys. Chem. Solids 52, 211–225 (1991)CrossRefGoogle Scholar
  11. [11]
    W Lehmann,J. Luminescence 5, 87 (1972)CrossRefGoogle Scholar
  12. [12]
    A Bril, W L Wanmaker and J W Ter Vrugt,J. Electrochem. Soc. 115, 776 (1968)CrossRefGoogle Scholar
  13. [13]
    R N Tripathi and S Sivaraman,Phys. Status Solidi A55, K123 (1979)Google Scholar
  14. [14]
    A D Pearson, G F Peterson and W R Northover,J. Appl. Phys. 37, 729 (1966)CrossRefADSGoogle Scholar
  15. [15]
    L G van Uitert and L F Johnson,J. Chem. Phys. 44, 3514 (1966)CrossRefADSGoogle Scholar
  16. [16]
    G Blasse and A Bril,Philips Res. Rep. 22, 481–504 (1967)Google Scholar
  17. [17]
    C K Jorgensen and B R Judd,Mol. Phys. 8, 281 (1964)CrossRefADSGoogle Scholar
  18. [18]
    H Mizuno and M Masuda,Proc. Int. Conf. Luminescence, Budapest (1966) p. 1703Google Scholar
  19. [19]
    G E Rindone,Luminescence in inorganic solids edited by P Goldberg (Academic Press, New York, London, 1968) 419–461Google Scholar
  20. [20]
    B V Shulgin, A A Kulesskii, A M Korovkin, V L Petrov and S V Podurovskii,Opt. Spectrosc. (USSR) 68, 491–492 (1990)ADSGoogle Scholar

Copyright information

© the Indian Academy of Sciences 1996

Authors and Affiliations

  • R V Subrahmanyam
    • 1
  • Shishir Jain
    • 1
  • Ashish Verma
    • 1
  • S Sivaraman
    • 1
  1. 1.Department of PhysicsDr. Harisingh Gour VishwavidyalayaSagarIndia

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