Journal
MATERIALS LETTERS
Volume 68, Issue -, Pages 258-260Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2011.10.072
Keywords
Nanoparticles; Phosphorus-doped ZnO; Luminescence; Metal organic chemical vapor deposition
Funding
- National Natural Science Foundation of China [50572095, 50772099, 51072181]
- Ministry of Education of China [20090101110044]
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Phosphorus-doped ZnO nanocrystals have been fabricated on Si substrates by metal organic chemical vapor deposition method without using additional thermal activation processes. Single-crystal phosphorus-doped ZnO nanocrystals have the average diameter of 20 nm and show preferred orientation with [0001] direction. The acceptor doping resulting in the tuned Fermi level of the ZnO nanocrystals was confirmed by the valence band X-ray photoelectron spectroscopy. The temperature-dependent photoluminescence measurements of undoped and phosphorus-doped ZnO nanocrystals also suggest that phosphorus was doped as an acceptor. The phosphorus-related acceptor state with energy level of 168 meV is estimated from the free electron to acceptor transition at 3.27 eV. (C) 2011 Elsevier B.V. All rights reserved.
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