Journal of Materials Research

Articles

Eu-doped Y2O3 phosphor films produced by electrostatic-assisted chemical vapor deposition

K. L. Choya1 c1, J. P. Feista2, A. L. Heyesa2 and B. Sua3

a1 Department of Materials, Imperial College of Science, Technology and Medicine, Prince Consort Road, London SW7 2BP, United Kingdom

a2 Department of Mechanical Engineering, Imperial College of Science, Technology and Medicine, Prince Consort Road, London SW7 2BP, United Kingdom

a3 Department of Materials, Imperial College of Science, Technology and Medicine, Prince Consort Road, London SW7 2BP, United Kingdom

Abstract

Europium-doped yttrium oxide (Y2O3:Eu) thermographic phosphor films were deposited on Ni-alloy substrates using a novel and cost-effective electrostatic-assisted chemical vapor deposition (EACVD) technique. The thermoluminescence properties were studied under irradiation by an ultraviolet laser. It was found that crystallized Y2O3: Eu films could be deposited at a temperature as low as 550 °C. Annealing of the as-deposited films at higher temperatures (>1000 °C) improved the luminescence properties due to further crystallization processes. The correlation of the lifetime decay and temperature change of the films showed that the EACVD-deposited films are suitable for use in phosphor thermometry for high-temperature applications.

(Received November 17 1998)

(Accepted March 23 1999)

Correspondence:

c1 Address all correspondence to this author. e-mail: k.choy@ic.ac.uk

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