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Self-assembly Drives Quantum Dot Photoluminescence

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Abstract

Engineering the spectral properties of quantum dots can be achieved by a control of the quantum dots organization on a substrate. Indeed, many applications of quantum dots as LEDs are based on the realization of a 3D architecture of quantum dots. In this contribution, we present a systematic study of the quantum dot organization obtained on different chemically modified substrates. By varying the chemical affinity between the quantum dots and the substrate, the quantum dot organization is strongly modified from the 2D monolayer to the 3D aggregates. Then the photoluminescence of the different obtained samples has been systematically studied and correlated with the quantum dot film organization. We clearly show that the interaction between the substrate and the quantum dot must be stronger than the quantum dot–quantum dot interaction to avoid 3D aggregation and that these organization strongly modified the photoluminescence of the film rather than intrinsic changes of the quantum dot induced by pure surface chemistry.

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Acknowledgements

We thank support from the “Action Concertée Nanosciences 2004” (NANOPTIP project) and the European Social funds FEDER.

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Authors and Affiliations

  1. Laboratoire de Nanotechnologie et d’Instrumentation Optique, LRC CEA/LETI, ICD FRE CNRS 2848, Université de Technologie de Troyes, 12 rue Marie Curie, BP2060, 10010, Troyes cedex, France

    J. Plain, P. Viste, G. Lérondel & P. Royer

  2. Institut Néel, CNRS and Université Joseph Fourier, 25 avenue des Martyrs, BP 166, 38042, Grenoble cedex 9, France

    Y. Sonnefraud & S. Huant

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  1. J. Plain
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  2. Y. Sonnefraud
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  3. P. Viste
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  4. G. Lérondel
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  5. S. Huant
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  6. P. Royer
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Correspondence to J. Plain.

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Plain, J., Sonnefraud, Y., Viste, P. et al. Self-assembly Drives Quantum Dot Photoluminescence. J Fluoresc 19, 311–316 (2009). https://doi.org/10.1007/s10895-008-0417-z

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  • DOI: https://doi.org/10.1007/s10895-008-0417-z

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