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Proceedings Paper

Nonradiative recombination process in Y2O2S:Eu3+ phosphors
Author(s): Hajime Yamamoto; Hidetsugu Matsukiyo
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Paper Abstract

A red cathode-ray phosphor, Y2OS:Eu3, shows a large decrease in luminescence efficiency at high excitation density at room temperature. The luminescence intensity is approximately proportional to the square root of the electron-beam current, indicating that a bimolecular-type nonradiative process competes with a radiative process. In undoped Y2OS, broad luminescence bands with peaks at around 35and 440nm are found at 80K. The defect levels involved in this luminescence can be a candidate of the nonradiative process at room temperature, because the luminescence is thermally quenched at room temperature.

Paper Details

Date Published: 9 February 1995
PDF: 6 pages
Proc. SPIE 2362, International Conference on Excitonic Processes in Condensed Matter, (9 February 1995); doi: 10.1117/12.200994
Show Author Affiliations
Hajime Yamamoto, Tokyo Engineering Univ. (Japan)
Hidetsugu Matsukiyo, Hitachi Ltd. (Japan)

Published in SPIE Proceedings Vol. 2362:
International Conference on Excitonic Processes in Condensed Matter
Jai Singh, Editor(s)

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