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Journal of Applied Physics / Volume 79 / Issue 10

J. Appl. Phys. 79, 7983 (1996); http://dx.doi.org/10.1063/1.362349 (8 pages)

Mechanisms behind green photoluminescence in ZnO phosphor powders

K. Vanheusden1, W. L. Warren1, C. H. Seager1, D. R. Tallant1, J. A. Voigt1, and B. E. Gnade2

1Sandia National Laboratories, Albuquerque, New Mexico 87185‐1349
2Texas Instruments, Inc., Dallas, Texas 75234

(Received 30 November 1995; accepted 1 February 1996)

We explore the interrelationships between the green 510 nm emission, the free‐carrier concentration, and the paramagnetic oxygen‐vacancy density in commercial ZnO phosphors by combining photoluminescence, optical‐absorption, and electron‐paramagnetic‐resonance spectroscopies. We find that the green emission intensity is strongly influenced by free‐carrier depletion at the particle surface, particularly for small particles and/or low doping. Our data suggest that the singly ionized oxygen vacancy is responsible for the green emission in ZnO; this emission results from the recombination of a photogenerated hole with the singly ionized charge state of this defect. © 1996 American Institute of Physics.

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KEYWORDS and PACS

Keywords

EPR SPECTRA, ZINC OXIDES, PHOSPHORS, PHOTOLUMINESCENCE, VACANCIES, ELECTRON SPIN RESONANCE, ABSORPTION SPECTRA, RECOMBINATION, POWDERS

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.362349

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

For access to fully linked references, you need to log in.
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    K. Vanheusden, W. L. Warren, J. A. Voigt, C. H. Seager, and D. R. Tallant, Appl. Phys. Lett. 67, 1280 (1995APPLAB000067000009001280000001).

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