Mechanism of carrier generation in conducting polymers

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Univ of California Santa Barbara, Santa Barbara, United States [1 ]
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Synth Met | / 1 -3 pt 1卷 / 539-544期
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The observation of photocurrent responsea t low fields; the onset of photoconductivity at a photon energy which coincides with the absorption edge; the absenceo f correlation between WWO; and; -AI@)/IL; and the independenceo f the onset field for current nonlinearityo n photon energy are all consistent with a model in which chargedp olarons( or polaron-excitonsw ith binding energy no greater than a few times kuT at room temperature); photogenerated through the inter-band n-TC* transition are the primary photoexcitationsin PPV. Acknowledgement: We thank Dr. U. Lemmer; Dr. D. Dick and D. Vacar for usefuld iscussionsT.h is researchw asc arriedo ut with support from the Office of Naval Researchu nder N0014-91-J-1235; (Kenneth Wynne; Program Officer). D.C. thanks support from the Italian Fulbright Commissiona nd G. Dellepiane;
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