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          Institute: MPI für Polymerforschung     Collection: MPI Polymerforschung     Display Documents



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ID: 56404.0, MPI für Polymerforschung / MPI Polymerforschung
Exciton dissociation in poly-phenylene-vinylene derivative : perylenediimide and hexabenzocoronene derivative : perylenediimide blend systems
Authors:Im, Chan; Tian, W.; Bässler, H.; Fechtenkötter, Andreas; Watson, Mark D.; Müllen, Klaus
Language:English
Date of Publication (YYYY-MM-DD):2003-10-09
Title of Journal:Synthetic Metals
Journal Abbrev.:Synth. Met.
Volume:139
Issue / Number:3
Start Page:683
End Page:686
Review Status:not specified
Audience:Not Specified
Abstract / Description:Steady state photoconduction both in a phenyl-substituted copolymeric poly-phenylene-vinylene (PhPPV) and in alkylated hexa-peri-hexabenzocoronene (HBC) doped by perylenediimide (PdI) at a broad range of dopant concentrations has been measured and compared to previous results [J. Chem. Phys. 117 (2002) 1395] on PhPPV doped by trinitrofluorenone (TNF). At relatively small concentration (< 10 wt.%), the yield of the photogeneration is almost independent of the system and blend ratio because practically every primary excitation dissociates at a donor-acceptor site and the subsequent escape from the coulombic potential is virtually system-independent. At dopant concentrations >10 wt.%, the yield of that escape process increases by approximately two orders of magnitude explained by both shielding of the pair potential and the onset of percolative electron motion across the acceptor network. (C) 2003 Elsevier Science B.V. All rights reserved.
Free Keywords:exciton dissociation, photoconductivity, photovoltaic device, semiconducting polymer, organic optoelectronics
Comment of the Author/Creator:Date: 2003, OCT 9
External Publication Status:published
Document Type:Article
Affiliations:MPI für Polymerforschung
External Affiliations:Univ Marburg, Inst Phys Macromol & Nucl Chem, D-35032 Marburg, Germany.; Univ Marburg, Ctr Mat Sci, D-35032 Marburg, Germany.
Identifiers:ISI:000185303600033 [ID No:1]
ISSN:0379-6779 [ID No:2]
LOCALID:P-03-217
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