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    Charge photogeneration and transport in side-chain carbazole polymers and co-polymers

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    Type
    Article
    Authors
    Li, Huawei
    Termine, Roberto
    Godbert, Nicolas
    Angiolini, Luigi
    Giorgini, Loris
    Golemme, Attilio
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Physical Science and Engineering (PSE) Division
    Date
    2011-07
    Permanent link to this record
    http://hdl.handle.net/10754/561805
    
    Metadata
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    Abstract
    The photoconductivity, hole mobility and charge photogeneration efficiency of a series of side-chain carbazole homopolymers and copolymers (with azo side-chains) have been investigated. Cyclic voltammetry measurement of frontier orbitals energies show that the HOMO energy is determined by the nature and the position of attachment of the linker between the main chain and the carbazole, the azo-moiety being not relevant in this respect. Hole mobility is not influenced by the HOMO energy but seems to depend on the degree of conformational mobility of the side-chains, reaching values of the order of 10-3cm2V-1s-1 in the best cases. The HOMO energy is instead extremely important when considering photogeneration efficiency, that can change by 10 orders of magnitude depending on the density of the carbazole side-chains in co-polymers and on the linker nature and attachment position. © 2011 Elsevier B.V. All rights reserved.
    Citation
    Li, H., Termine, R., Godbert, N., Angiolini, L., Giorgini, L., & Golemme, A. (2011). Charge photogeneration and transport in side-chain carbazole polymers and co-polymers. Organic Electronics, 12(7), 1184–1191. doi:10.1016/j.orgel.2011.03.043
    Publisher
    Elsevier BV
    Journal
    Organic Electronics
    DOI
    10.1016/j.orgel.2011.03.043
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.orgel.2011.03.043
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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