The FeCl3-doped poly(3-alkyithiophenes) in solid state |
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| Affiliation: | 1. Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland;2. Institut de Chimie, Université de Neuchâtel, Avenue de Bellevaux 51, CH-2000 Neuchâtel, Switzerland;1. Institute of Physics, National Chiao-Tung University, 1001 University Rd., Hsinchu, 30010, Taiwan;2. Institute of Photonics Technologies, National Tsing-Hua University, 101 Sec. 2 Guang-Fu Rd., Hsinchu, 30013, Taiwan;3. Department of Photonics, National Chiao-Tung University, 1001 University Rd., Hsinchu, 30010, Taiwan;4. Graduate Institute of Photonics and Optoelectronics, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei, 10617, Taiwan;1. CSIRO Process Science and Engineering/CSIRO Minerals Down Under National Research Flagship, Australia;2. RMDSTEM Limited, Australia;1. Dipartimento di Chimica, Università degli Studi di Bari “Aldo Moro”, Italy;2. ENEA – Unità Tecnica Tecnologia dei Materiali – Sezione Materiali Compositi e Nanostrutturati – Brindisi, Brindisi, Italy;3. CNR-IFN and Dipartimento Interateneo di Fisica “Michelangelo Merlin”, Università degli Studi di Bari “Aldo Moro”, Italy |
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| Abstract: | The FeCl3-doped three poly(3-alkylthiophenes) (P3ATs) in solid state, i.e. poly(3-octylthiophene) (P3OT), poly(3-dodecylthiophene) (P3ODT) and poly(3-octadecylthiophene) (P3ODT), were investigated in this paper. In X-ray diffraction results, there are obvious variations of the interlayer and interlayer spacings in the layered structures of P3ATs. In addition, it is found that some orientations of the side-chain groups occur after the doping process. The infrared spectra have also shown the microstructural changes arising from the readjustments of the polymer chains due to the intervention of the dopant. The presence of dopant leads to the formation of bipolarons and polarons at the same time. The conductivity measurements reveal that the conductivity decreases with the increase of the length of side-chain group. We have also observed the relaxation behaviors in the conductivities of the doped polymers. |
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