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Graduate School of Science / Faculty of Science >
Peer-reviewed Journal Articles, etc >
Photoluminescence quenching in cobalt doped ZnO nanocrystals
| Title: | Photoluminescence quenching in cobalt doped ZnO nanocrystals |
| Authors: | Sekika Yamamoto Browse this author |
| Keywords: | cobalt | | excitons | | II-VI semiconductors | | inclusions | | nanostructured materials | | photoluminescence | | radiation quenching | | red shift | | semiconductor doping | | time resolved spectra | | wide band gap semiconductors | | zinc compounds |
| Issue Date: | 7-May-2012 |
| Journal Title: | Journal of Applied Physics |
| Volume: | 111 |
| Issue: | 9 |
| Start Page: | 094310 |
| Publisher DOI: | 10.1063/1.4710533 |
| Abstract: | Influence of cobalt doping on the luminescence properties of ZnO nanocrystals with average diameter of 3.0 nm is investigated. Time resolved measurements at 20 K show that the dark exciton luminescence is completely lost in the nanocrystals doped with cobalt, while the perturbed luminescence with slight red shift survives and exhibits a non-exponential decay curve reflecting random distribution of cobalt atoms. By analyzing the non-exponentiality, the increase of the decay rate of the band-edge luminescence induced by the inclusion of single cobalt atom is estimated to be 0.012 ps-1 |
| Relation: | http://jap.aip.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/49182 |
| 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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