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Photoluminescence and Raman spectroscopy of polycrystalline ZnO nanofibers deposited by electrospinning

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Title: Photoluminescence and Raman spectroscopy of polycrystalline ZnO nanofibers deposited by electrospinning
Author(s): Sen, Banani; Stroscio, Michael; Dutta, Mitra
Subject(s): Zinc oxide electrospinning
Abstract: The technique of electrospinning offers the advantage of growing nanowires in bulk quantities in comparison with traditional methods. We report optical studies of polycrystalline zinc oxide (ZnO) nanofibers (∼100 nm thick and 5 μm long) deposited by electrospinning. Photoluminescence from the nanofibers shows a near-ultraviolet (near-UV) peak corresponding to near-band-edge emission and a strong broad peak in the visible region from oxygen antisite and interstitial defects. Temperature-dependent photoluminescence spectroscopy reveals that different carrier recombination mechanisms are dominant at low temperature. Our Raman spectroscopy results demonstrate that characterization of the quasimodes of longitudinal optical (LO) and transverse optical (TO) phonons present in an ensemble of polycrystalline nanofibers tilted at various angles in addition to the dominant E 2(high) mode provides a promising technique for assessing the quality of such randomly oriented nanowires.
Issue Date: 2011-06-15
Publisher: Springer Verlag
Citation Info: Sen, B., Stroscio, M., & Dutta, M. 2011. Photoluminescence and Raman Spectroscopy of Polycrystalline ZnO Nanofibers Deposited by Electrospinning. Journal of Electronic Materials, 40 (9): 2015-2019. DOI: 10.1007/s11664-011-1688-8.
Type: Article
Description: Post print version of article may differ from published version. The original publication is available at; DOI: 10.1007/s11664-011-1688-8
ISSN: 0361-5235
Date Available in INDIGO: 2012-03-09

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