ESR and Transport Studies in Electrochemically Doped Polythiophene Film

概要

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Electron spin resonance (ESR), electrical conductivity and thermoelectricpower are studied in electrochemically prepared and doped polythiophene films.The ESR spin density increases by two orders of magnitude up to dopant con-centration of ca. 3 mold, then decreases, while the conductivity increases drasti-caIJy by more than ten orders of magnitude until this doping level, followed bya rather mild increase. The ESR linewidth decreases sharply from 9 G to 0.4 Gupon slight doping with shape change from Gaussian to Lorenzian. The contribu-Lion of Pauli-paramagnetism to the spin succeptibility and the positive thermo-electric power of ca. 20 jtY/K which depends linearly on the temperature areobserved at heavily doped region. These results are discussed in terms of shallowand deep polarons, and formation of bipolaron up to intermediate doping levelsand the hole conduction at the metallic regime.
社団法人日本物理学会の論文
1985-03-15