Efficient, high-bandwidth organic multilayer photodetectors

DOI PDF 被引用文献19件
  • P. Peumans
    Center for Photonics and Optoelectronic Materials (POEM), Department of Electrical Engineering and the Princeton Materials Institute, Princeton University, Princeton, New Jersey 08544
  • V. Bulović
    Center for Photonics and Optoelectronic Materials (POEM), Department of Electrical Engineering and the Princeton Materials Institute, Princeton University, Princeton, New Jersey 08544
  • S. R. Forrest
    Center for Photonics and Optoelectronic Materials (POEM), Department of Electrical Engineering and the Princeton Materials Institute, Princeton University, Princeton, New Jersey 08544

説明

<jats:p>Organic photodetectors incorporating an ultrathin (⩾5 Å) donor–acceptor alternating multilayer stack as the optically active region exhibit external quantum efficiencies of 75% across the visible spectrum, and have subnanosecond response times. Photogenerated excitons efficiently dissociate into free electrons and holes by rapid charge-transfer across the several closely spaced organic-layer interfaces. The dependence of the quantum efficiency on applied voltage and layer thickness suggests that escape of photogenerated carriers from potential wells formed by the multilayers due to tunneling prior to recombination leads to the high efficiencies observed. The impulse response of the highest-bandwidth devices is characterized by a full width at half maximum of (720±70) ps. The performance of these devices makes them a useful building block for molecular organic photonic integrated circuits.</jats:p>

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