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Structural Disorders in Gd2O2S:Tb Phosphors

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Electroluminescence

Part of the book series: Springer Proceedings in Physics ((SPPHY,volume 38))

Abstract

The luminescence characteristics of Gd2O2S:Tb phosphors prepared under different conditions are described and the possibility of electroluminescence discussed. X-ray diffraction and cathodoluminescence results are used to optimise synthesis parameters. The analysis of diffraction data for reflection intensity distribution from different (hkl) plane shows the presence of a disordered crystal structure. Brightness of luminescence emission is found to depend upon the extent of this disorder. The green cathodoluminescence is primarily due to the characteristic line emission 5D4-7F4 of Tb3+ in the spectral region of 540 nm. Under ac field excitation, the voltage dependence of electroluminescnece (EL) brightness follows the Destriau relation, B = B0 exp (-b/Vl/2).

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Author information

Authors and Affiliations

  1. Division of Materials, National Physical Laboratory, Dr. K. S. Krishnan Road, 110012, New Delhi, India

    V. Shanker, P. K. Ghosh, H. P. Narang & H. Chander

Authors
  1. V. Shanker
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  2. P. K. Ghosh
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  3. H. P. Narang
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  4. H. Chander
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Editor information

Editors and Affiliations

  1. Department of Electronics, Tokyo Engineering University, 1404 Katakura, Hachioji, Tokyo 192, Japan

    Shigeo Shionoya Ph.D.

  2. Department of Electronics, Tottori University, Koyama, Tottori 680, Japan

    Hiroshi Kobayashi Ph.D.

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© 1989 Springer-Verlag Berlin, Heidelberg

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Shanker, V., Ghosh, P.K., Narang, H.P., Chander, H. (1989). Structural Disorders in Gd2O2S:Tb Phosphors. In: Shionoya, S., Kobayashi, H. (eds) Electroluminescence. Springer Proceedings in Physics, vol 38. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-93430-8_26

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  • DOI: https://doi.org/10.1007/978-3-642-93430-8_26

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-93432-2

  • Online ISBN: 978-3-642-93430-8

  • eBook Packages: Springer Book Archive

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