Efficient Solar Cells Using All-Organic Nanocrystalline Networks

Authors

  • F. Yang,

    1. Department of Electrical Engineering & Computer Science, University of Michigan, Ann Arbor, MI 48109 (USA)
    2. Department of Electrical Engineering, Princeton University, Princeton, NJ 08544 (USA)
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  • K. Sun,

    1. Department of Materials Science & Engineering, University of Michigan, Ann Arbor, MI 48109 (USA)
    2. Electron Microbeam Analysis Laboratory, University of Michigan, Ann Arbor, MI 48109 (USA)
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  • S. R. Forrest

    1. Department of Electrical Engineering & Computer Science, University of Michigan, Ann Arbor, MI 48109 (USA)
    2. Department of Materials Science & Engineering, University of Michigan, Ann Arbor, MI 48109 (USA)
    3. Department of Physics, University of Michigan, Ann Arbor, MI 48109 (USA)
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  • The authors gratefully acknowledge Barry P. Rand and Jay B. Benziger for helpful discussions, and Guodan Wei for absorption measurements. We also thank the US Air Force Office of Scientific Research and Global Photonic Energy Corporation for financial support.

Abstract

original image

A full-organic donor/acceptor (DA) network formed by crystalline molecules is introduced to organic solar cells. Structural analysis shows that the network is composed of donor and acceptor nanocrystals. The increased DA interface area increases photo current generation and the interconnected networks form conductive pathways for charge extraction. The solar cell using nanocrystalline DA network shows a three-fold improvement on photocurrent over that of a bilayer cell using the same DA combination.

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