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Enhanced band-edge photoluminescence from MgO passivated ZnO nanocrystals
| Title: | Enhanced band-edge photoluminescence from MgO passivated ZnO nanocrystals |
| Authors: | Yamamoto, Sekika Browse this author | | Mishina, Tomobumi Browse this author |
| Keywords: | ZnO | | Nanocrystal | | Luminescence | | 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) |
| URI: | http://hdl.handle.net/2115/45496 |
| 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)
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Submitter: 山本 夕可
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