Multiexcitons in a Single Core-Shell Colloidal Quantum dots


The micro-photoluminescence (μ-PL) spectra of a single CdTe/CdSe quasi- type II core-shell colloidal quantum dots (CQDs) unambiguously reveal an emission of a biexciton (2X), a triexciton (3X) and a quadraexciton (4X) under continuous-wave excitation. The CQDs were characterized by optical measurements and theoretical consideration of carrier’s wavefunctions distribution of a quasi-type II core-shell structure.

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  1. [1]

    V. I. Klimov, S. A. Ivanov, J. Nanda, M. Achermann, I. Bezel, J. A. McGuire and A. Piryatinski, Nature 447, 441 (2007);

    CAS  Article  Google Scholar 

  2. [2]

    A. J. Nozik, Physica E 14, 115/120 (2002);

    Article  Google Scholar 

  3. [3]

    P. O. Anikeeva, J. E. Halpert, M. G. Bawendi and V. Bulovic, Nano Letters 9, 2532 (2009);

    CAS  Article  Google Scholar 

  4. [4]

    X. Wang, X. Ren, K. Kahen, M. A. Hahn, M. Rajeswaran, S. Maccagnano/Zacher, J. Silcox, G. E. Cragg, Al. L. Efros and T. D. Krauss, Nature 459, 686 (2009);

    CAS  Article  Google Scholar 

  5. [5]

    P. Frantsuzov, M. Kuno, B. Jankó, R. A. Marcus, Nature Phys. 4, 519 (2008);

    Article  Google Scholar 

  6. [6]

    R. Osovsky, D. Cheskis, V. Kloper, A. Sashchiuk, E. Lifshitz, Phys. Rev. Lett. 102, 197401 (2009);

    Article  Google Scholar 

  7. [7]

    V. Kloper, R. Osovsky, J. Kolny/Olesiak, A. Sashchiuk, E. Lifshitz, E. J. Phys. Chem. C 111, 10336 (2007);

    CAS  Article  Google Scholar 

  8. [8]

    R. Osovsky, V. Kloper, J. Kolny/Olesiak, A. Sashchiuk, E. Lifshitz, J. Phys. Chem. C 111, 10841 (2007);

    Google Scholar 

  9. [9]

    L. Banyai, and S.W. Koch, Semiconductor Quantum Dots (World Scientific Press, Singapore, 1993);

    Google Scholar 

  10. [10]

    L. Brus, J. Chem. Phys. 80, 4403 (1984);

    CAS  Article  Google Scholar 

  11. [11]

    D. Schoos, A. Mews, A. Eychmuller, H. Weller, Phys. Rev. B 49, 17072 (1994);

    Article  Google Scholar 

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Correspondence to Dima Cheskis.

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Cheskis, D., Osovsky, R., Kloper, V. et al. Multiexcitons in a Single Core-Shell Colloidal Quantum dots. MRS Online Proceedings Library 1207, 510 (2009).

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