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Understanding Degradation of Doped Electroluminescent ZnS Phosphors

Published online by Cambridge University Press:  01 February 2011

Yu Jiang ,
Jacob Stanley ,
Laurel Ruhlen ,
Chris France ,
John Willey ,
Anna Bezryadina ,
Frank Bridges  and
Sue Carter
Yu Jiang
Affiliation:
jiangyup@gmail.com, University of California, Santa Cruz, Physics, 1156 High St, Santa Cruz, CA, 95064, United States, 831-459-3646, 831- 459-3043
Jacob Stanley
Affiliation:
jtstan@gmail.com, University of California, Santa Cruz, Physics, Santa Cruz, CA, 95064, United States
Laurel Ruhlen
Affiliation:
ruhlen@gmail.com, University of California, Santa Cruz, Physics, Santa Cruz, CA, 95064, United States
Chris France
Affiliation:
chris@physics.ucsc.edu, University of California, Santa Cruz, Physics, Santa Cruz, CA, 95064, United States
John Willey
Affiliation:
jwilley@ucsc.edu, University of California, Santa Cruz, Physics, Santa Cruz, CA, 95064, United States
Anna Bezryadina
Affiliation:
abezryadina@physics.ucsc.edu, University of California, Santa Cruz, Physics, Santa Cruz, CA, 95064, United States
Frank Bridges
Affiliation:
bridges@physics.ucsc.edu, University of California, Santa Cruz, Physics, Santa Cruz, CA, 95064, United States
Sue Carter
Affiliation:
sacarter@ucsc.edu, University of California, Santa Cruz, Physics, Santa Cruz, CA, 95064, United States
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Abstract

We have shown recently that the degradation of AC electroluminescence (EL) in ZnS:Cu,Cl and similar phosphors can be significantly reversed by a short anneal near 200°C. To better understand the degradation/rejuvenation processes, we investigated EL degradation and rejuvenation under different conditions. To probe for changes in the local atomic structure about the Cu sites, we collected Extended X-ray Absorption Fine Structure (EXAFS) data at the Cu K-edge EXAFS data for several as-made, thermally degraded (240°C anneal), and EL degraded powders.

Keywords

optical propertiesextended x-ray absorption fine structure(EXAFS)semiconducting
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1083: Symposium R – Coupled Mechanical, Electrical and Thermal Behaviors of Nanomaterials , 2008 , 1083-R06-06
Copyright
Copyright © Materials Research Society 2008

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References

REFERENCES

1. Tanaka, S., Kobayashi, H. and Sasakura, H., “Electroluminescence materials,” Handbook, Phosphor, ed. Shionoya, S. and Yen, W. M.(CRC Press) pp. 601–612.Google Scholar
2. Warkentin, M., Bridges, F., Carter, S. A. and Anderson, M., Phys. Rev. B 75, 075301 (2007).Google Scholar