Nonradiative recombination process in Y2O2S:Eu3+ phosphors

Hajime Yamamoto; Hidetsugu Matsukiyo

doi:10.1117/12.200994

9 February 1995 Nonradiative recombination process in Y2O2S:Eu3+ phosphors

Hajime Yamamoto, Hidetsugu Matsukiyo

Proceedings Volume 2362, International Conference on Excitonic Processes in Condensed Matter; (1995) https://doi.org/10.1117/12.200994
Event: Excitonic Processes in Condensed Matter: International Conference, 1994, Darwin, Australia

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.

Citation Download Citation

Hajime Yamamoto and Hidetsugu Matsukiyo "Nonradiative recombination process in Y2O2S:Eu3+ phosphors", Proc. SPIE 2362, International Conference on Excitonic Processes in Condensed Matter, (9 February 1995); https://doi.org/10.1117/12.200994

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