Electroluminescent Cu-doped CdS Quantum Dots

Authors

  • Jan W. Stouwdam,

    1. Molecular Materials and Nanosystems Eindhoven University of Technology P. O. Box 513, 5600 MB Eindhoven (The Netherlands)
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  • René A. J. Janssen

    Corresponding author
    1. Molecular Materials and Nanosystems Eindhoven University of Technology P. O. Box 513, 5600 MB Eindhoven (The Netherlands)
    • Molecular Materials and Nanosystems Eindhoven University of Technology P. O. Box 513, 5600 MB Eindhoven (The Netherlands).
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Abstract

original image

Incorporating Cu-doped CdS quantum dots into a polymer host produces efficient light-emitting diodes. The Cu dopant creates a trap level that aligns with the valence band of the host, enabling the direct injection of holes into the quantum dots, which act as emitters. At low current densities, the luminance efficiency maximizes at 9 cd A−1, providing an external quantum efficiency of 5%.

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