Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 177, Issue 9, Pages 689-693Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2012.03.045
Keywords
Mg-doped ZnO; Red luminescence; Sol-gel
Funding
- National High Technology Development 863 Program of China [2009AA03Z428]
- Fok Ying Tong Education Foundation [111050]
- Award Fund for Prominent Youth Scientists of Shandong Province of China [BS2009DX014]
- Key Project of Science and Technology of Shandong Province of China [2010GGX10127]
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Magnesium-doped zinc oxide phosphors with the formula of MgxZn1-xO were synthesized by sol-gel method, and the crystal structure and luminescent properties were investigated by means of XRD, SEM, FTIR, Raman spectrum, EPR. DRS and PL. The results indicated that the materials consisting of MgxZn1-xO particles exhibit good crystallinity and the particle size varies with the calcining temperature. An obvious blue shift of excitation band was observed in samples as the doping concentration was increased from 5 at% to 10 at%. The optimal concentration for obtaining the highest photoluminescent intensity for MgxZn1-xO phosphors was 10 at% (calcined at 875 degrees C for 3 h). Raman and EPR results suggested that the red emission of Mg-doped ZnO phosphors was attributed to zinc vacancies and oxygen vacancies. (C) 2012 Elsevier B.V. All rights reserved.
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