期刊
SUPERLATTICES AND MICROSTRUCTURES
卷 52, 期 1, 页码 84-91出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.spmi.2012.03.016
关键词
Nanoparticles; Yttrium doping; Enhance UV emission
资金
- Program for the High Technology Research and Development of China (863) [2009AA03Z303]
- Program for the National Natural Science Foundation of China [61008051]
- Program for the development of Science and Technology of Jilin province [20082112, 20080151, 20090140, 20100113]
- Eleventh Five-Year Program for Science and Technology of Education Department of Jilin Province [20090422, 20100355]
- Program for the scientific research of Jilin Normal University [2008051]
- Open Project Program of National Laboratory of Superhard Materials [201004]
The Zn1-xYxO nanoparticles with good optical properties have been prepared by sol-gel method. The yttrium doping effect on the structures and optical properties were investigated by XRD, SEM, XPS and low temperature photoluminescence. The UV emission intensity of yttrium doped ZnO was over 300 times stronger than that of pure ZnO, which was an exciting result in enhancing the ultraviolet near band edge emission in photoluminescence from ZnO nanoparticles. The UV emission band of doped ZnO nanoparticles exhibits a red shift from 388 to 398 nm, indicating a shallow energy level near valence band has been formed due to the yttrium doping into ZnO lattices. The defect-related band is suppressed (I-D/I-UV = 1-0.83) considerably in Zn1-xYxO nanoparticles, revealing the quenching of the broad yellow-orange emission. The doping effect on the optical properties is investigated by temperature dependent photoluminescence. The experimental results indicated that the donor level of yttrium is deeper than that of undoped ZnO. (C) 2012 Elsevier Ltd. All rights reserved.
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