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Size-dependent electron-hole exchange interaction in CdSe quantum dots

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Il Nuovo Cimento D

Summary

We have investigated the fine structure of luminecence of CdSe nanocrystals observed with size-selective excitation. We show that the luminescence line closest to the laser arises from the recombination of the optically forbidden A-exciton. Radiative recombination occurs via a phonon-assisted virtual transition to theB-exciton state. The electron-hole exchange energy obtained from the experimental results strongly increases with decreasing nanocrystal size as expected from the increasing overlap of the electron and hole wave functions. The size dependence is in good agreement with the theoretical predictions.

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Authors and Affiliations

  1. Groupe de Physique des Solides, Universités Paris 6 et 7, CNRS URA 17, Tour 23 2, Place Jussieu, 75251, Paris Cedex 05, France

    M. Chamarro, C. Gourdon & P. Lavallard

  2. A. F. Ioffe Physico-Technical Institute, 194201, St. Petersburg, Russia

    O. Lublinskaya & A. I. Ekimov

Authors
  1. M. Chamarro
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  2. C. Gourdon
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  3. P. Lavallard
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  4. O. Lublinskaya
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  5. A. I. Ekimov
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Chamarro, M., Gourdon, C., Lavallard, P. et al. Size-dependent electron-hole exchange interaction in CdSe quantum dots. Il Nuovo Cimento D 17, 1407–1412 (1995). https://doi.org/10.1007/BF02457218

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  • DOI: https://doi.org/10.1007/BF02457218

PACS 71.35

PACS 73.20

PACS 01.30Cc

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