期刊
JOURNAL OF LUMINESCENCE
卷 134, 期 -, 页码 35-41出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2012.09.021
关键词
Nails; Nonradiative recombination; Photoluminescence
类别
资金
- National Natural Science Foundation of China [11204104, 61178074, 61008051]
- Program for the Development of Science and Technology of Jilin province [20110415, 201115219, 20100113]
- Eleventh Five-Year Program for Science and Technology of Education Department of Jilin Province [20090422, 20110169, 20110170]
- Open Project Program for National Laboratory of Superhard Materials [201004]
- Program for the Master Students' Scientific and Innovative Research of Jilin Normal University [201112, 201101, 201139]
Well aligned ZnO nails with small heads and rods arrays have been grown on indium tin oxides (ITO) substrates by a simple hydrothermal method without any metal catalyst or additives. The optical properties of the as-grown ZnO microstructures were investigated by room-temperature and temperature-dependent photoluminescence spectra. From the PL spectra measured in the range of 80-300 K, the origins of near-band-gap UV lines have been identified in terms of bound exciton complexes and the phonon replicas. We also estimated that the activation energy of the temperature quenching for ZnO nails is higher than that of rods, indicating less nonradiative recombination contributes to the emission process in ZnO nails, which was further testified by the time-resolved PL results. Thus, the relative emission intensity ratio between UV and deep level emission in room-temperature PL spectra for nails is 2.3-times higher than that of rods. (c) 2012 Elsevier B.V. All rights reserved.
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