S J Blundell et al 2002 J. Phys.: Condens. Matter 14 9987 doi:10.1088/0953-8984/14/42/311
Muon-spin relaxation study of anisotropic charge carrier motion in polyphenylene vinylene-based polymers
S J Blundell1,4, F L Pratt2, I M Marshall1, C A Steer1, W Hayes1, A Husmann1, C Fischmeister3, R E Martin3 and A B Holmes3
Show affiliationsMuon-spin relaxation (μ SR) experiments on the conducting polymers poly(2, 3-dibutoxy-1, 4-phenylene vinylene) and poly(2, 5-bis(dimethyloctylsilyl)-1, 4-phenylene vinylene) probe the dynamics of the highly mobile polarons created by the muon-implantation process in which muonium reacts with the polymer forming a radical state. The fluctuating spin density induced by the electronic spin defect rapidly diffusing up and down the chain leads to a characteristic relaxation, the temperature and field dependences of which permit the extraction of intrachain and interchain diffusion rates. The intrachain diffusion rate decreases with temperature and can be fitted to a model of phonon-limited transport. The interchain diffusion rate increases with temperature and can be fitted to an activated temperature dependence.
- PACS
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76.75.+i Muon spin rotation and relaxation
66.30.Lw Diffusion of other defects
72.20.Ee Mobility edges; hopping transport
71.38.-k Polarons and electron-phonon interactions
72.80.Le Polymers; organic compounds (including organic semiconductors)
- Subjects
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Soft matter, liquids and polymers
- Dates
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Issue 42 (28 October 2002)
Received 15 August 2002
Published 11 October 2002
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Muon-spin relaxation study of anisotropic charge carrier motion in polyphenylene vinylene-based polymers
S J Blundell et al 2002 J. Phys.: Condens. Matter 14 9987
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