Blinking Behavior of Surface-Defect and Impurity Luminescence in Nondoped and Mn2+-Doped CdS Nanocrystals
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概要
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We report on the photoluminescence (PL) blinking behavior of nondoped and Mn-doped CdS/ZnS nanocrystals studied using single nanocrystal spectroscopy at room temperature. The blinking phenomenon is clearly observed in the surface-defect luminescence of nondoped single CdS/ZnS nanocrystals. In Mn-doped CdS/ZnS nanocrystals, however, PL blinking is markedly suppressed, and the Mn2+-related PL has a long on-time. Our findings indicate that Mn2+ ions are excited by fast energy transfer from photoexcited excitons in both neutral and ionized CdS/ZnS nanocrystals. We discuss energy transfer processes from the host nanocrystals to the Mn2+ ions.
- 2009-08-15
著者
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Kanemitsu Yoshihiko
Institute For Chemical Research Kyoto University
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Ishizumi Atsushi
Graduate School Of Materials Science Nara Institute Of Science And Technology
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Ishizumi Atsushi
Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192
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