Light intensity dependence of open-circuit voltage of polymer: fullerene solar cells

L. J. A. Koster, V. D. Mihailetchi, P. W. M. Blom

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    Abstract

    The open-circuit voltage V-oc of polymer:fullerene bulk heterojunction solar cells is investigated as a function of light intensity for different temperatures. Devices consisted of a blend of a poly(p-phenylene vinylene) derivative as the hole conductor and 6,6-phenyl C-61-butyric acid methyl ester as the electron conductor. The observed photogenerated current and V-oc are at variance with classical p-n junction-based models. The influence of light intensity and recombination strength on V-oc is consistently explained by a model based on the notion that the quasi-Fermi levels are constant throughout the device, including both drift and diffusion of charge carriers. (C) 2005 American Institute of Physics.
    Original languageEnglish
    Article number123509
    Number of pages3
    JournalApplied Physics Letters
    Volume86
    Issue number12
    DOIs
    Publication statusPublished - 21-Mar-2005

    Keywords

    • TEMPERATURE
    • TRANSPORT
    • SIMULATION
    • ELECTRON

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