AVS 46th International Symposium
    Organic Electronic Materials Topical Conference Monday Sessions
       Session OE+EM+FP-MoA

Invited Paper OE+EM+FP-MoA1
Generation and Transport of Charge Carriers in Conjugated Polymers

Monday, October 25, 1999, 2:00 pm, Room 616/617

Session: Transport and Nanostructures in Organic Films
Presenter: H. Baessler, Philipps Universität, Germany
Authors: V.I. Arkhipov, Philipps Universität, Germany
H. Baessler, Philipps Universität, Germany
S. Barth, Philipps Universität, Germany
C. Im, Philipps Universität, Germany
D. Hertel, Philipps Universität, Germany
B. Schweitzer, Philipps Universität, Germany
Correspondent: Click to Email
Upon photoexcitation of conjugated polymers, such as ladder-type poly-phenylene (LPPP) and substituted PPVs, both geminately bound electron-hole pairs and free charge cariers are generated. Evidence for geminate pair production in LPPP comes from electric field assisted delayed fluorescence. Intrinsic free charge carrier generation occurs via on-chain dissociation of vibrationally hot singlet excitations. Motion of positive charge carriers has been studied involving time of flight experiments. From the hole mobility in a sieres of substituted PPV as a function of temperature and electric field it will be concluded that transport is disorder controlled as it is in molecularly doped polymers. An exception of this rule is hole transport in LPPP. The question of intra versus inter chain transport will briefly be addressed. This work was supported by the Deutsche Forschungsgemeinschaft (Sonderforschungsbereich 383) and the Stiftung Volkswagenwerk.