The effect of defects on the electronic structure of long chain ferroelectric polymers

Jie Xiao, Xin Zhou, Qiming Zhang, P. A. Dowben

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    The apparent molecular density of states from combined photoemission and inverse photoemission spectroscopies is compared to the bulk conductivity and frequency dependent dielectric measurements for a variety of ferroelectric polymer poly(vinylidene fluoride) (PVDF) copolymers and terpolymers. While some extra chemical groups introduced into the PVDF long chains increase the measured conductivities at room temperature and can cause significant changes in the dielectric properties, few changes are observed in the overall experimental molecular density of states. The exception appears to be the very short polymer chains. The significance of this comparison is that profound changes can occur in the overall dielectric and transport properties of this class of polymers and copolymers through molecular "dopant addition," without altering the overall density of states of the dominant PVDF polymer host.

    Original languageEnglish (US)
    Article number044105
    JournalJournal of Applied Physics
    Volume106
    Issue number4
    DOIs
    StatePublished - Sep 9 2009

    Fingerprint

    vinylidene
    electronic structure
    fluorides
    defects
    polymers
    dielectric properties
    copolymers
    photoelectric emission
    conductivity
    transport properties
    causes
    room temperature
    spectroscopy

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)

    Cite this

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    abstract = "The apparent molecular density of states from combined photoemission and inverse photoemission spectroscopies is compared to the bulk conductivity and frequency dependent dielectric measurements for a variety of ferroelectric polymer poly(vinylidene fluoride) (PVDF) copolymers and terpolymers. While some extra chemical groups introduced into the PVDF long chains increase the measured conductivities at room temperature and can cause significant changes in the dielectric properties, few changes are observed in the overall experimental molecular density of states. The exception appears to be the very short polymer chains. The significance of this comparison is that profound changes can occur in the overall dielectric and transport properties of this class of polymers and copolymers through molecular {"}dopant addition,{"} without altering the overall density of states of the dominant PVDF polymer host.",
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    The effect of defects on the electronic structure of long chain ferroelectric polymers. / Xiao, Jie; Zhou, Xin; Zhang, Qiming; Dowben, P. A.

    In: Journal of Applied Physics, Vol. 106, No. 4, 044105, 09.09.2009.

    Research output: Contribution to journalArticle

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    T1 - The effect of defects on the electronic structure of long chain ferroelectric polymers

    AU - Xiao, Jie

    AU - Zhou, Xin

    AU - Zhang, Qiming

    AU - Dowben, P. A.

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    AB - The apparent molecular density of states from combined photoemission and inverse photoemission spectroscopies is compared to the bulk conductivity and frequency dependent dielectric measurements for a variety of ferroelectric polymer poly(vinylidene fluoride) (PVDF) copolymers and terpolymers. While some extra chemical groups introduced into the PVDF long chains increase the measured conductivities at room temperature and can cause significant changes in the dielectric properties, few changes are observed in the overall experimental molecular density of states. The exception appears to be the very short polymer chains. The significance of this comparison is that profound changes can occur in the overall dielectric and transport properties of this class of polymers and copolymers through molecular "dopant addition," without altering the overall density of states of the dominant PVDF polymer host.

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