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Enhanced band-edge photoluminescence from MgO passivated ZnO nanocrystals

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Title: Enhanced band-edge photoluminescence from MgO passivated ZnO nanocrystals
Authors: Yamamoto, Sekika Browse this author
Mishina, Tomobumi Browse this author
Keywords: ZnO
Surface passivation
Issue Date: Apr-2011
Publisher: Elsevier B.V.
Journal Title: Journal of Luminescence
Volume: 131
Issue: 4
Start Page: 620
End Page: 622
Publisher DOI: 10.1016/j.jlumin.2010.11.002
Abstract: Intense band-edge photoluminescence is observed from ZnO nanocrystals with an average diameter of about 3 nm. It is found that the growth from high temperature (70℃) precursor solution and succeeding surface passivation by MgO layer together lead to a five times enhancement of band-edge luminescence, in comparison to those grown by conventional low-temperature method without surface passivation. It is also found that above-band-gap illumination on the nanocrystals further enhances the luminescence intensity by five times. The strong photo-enhancement is considered to be aided by the reduction of surface non-radiative recombination path.
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山本 夕可

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