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Proceedings Paper

Photoluminescence blinking and spectral diffusion of single CdSe/ZnS nanocrystals: charge fluctuation effects
Author(s): Hiroto Ibuki; Toshiyuki Ihara; Yoshihiko Kanemitsu
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Paper Abstract

We studied time-dependent fluctuations of photoluminescence (PL) spectra of single CdSe/ZnS nanocrystals (NCs), which show PL blinking and spectral diffusion. We observed correlations between PL peak energy, intensity, and linewidth, which are due to the quantum confined Stark effect. We found that a characteristic asymmetric shape appears in the PL peak energy histogram, which can be explained by a simple field-fluctuation model. By comparing the experimental results with theoretical calculations, we evaluate the mean value and standard deviation of the fluctuating electric field. We discuss the experimental data using a model considering a few elementary charges around the NCs, which are the origin of the field fluctuation.

Paper Details

Date Published: 15 March 2016
PDF: 8 pages
Proc. SPIE 9758, Quantum Dots and Nanostructures: Growth, Characterization, and Modeling XIII, 97580R (15 March 2016); doi: 10.1117/12.2210817
Show Author Affiliations
Hiroto Ibuki, Kyoto Univ. (Japan)
Toshiyuki Ihara, Kyoto Univ. (Japan)
Yoshihiko Kanemitsu, Kyoto Univ. (Japan)


Published in SPIE Proceedings Vol. 9758:
Quantum Dots and Nanostructures: Growth, Characterization, and Modeling XIII
Diana L. Huffaker; Holger Eisele; Kimberly A. Dick, Editor(s)

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