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- W2078441458 abstract "We have measured current-voltage (I-V) characteristics of vapour-deposited films of various oligothiophenes in the direction parallel to the substrate using a two-point probe technique with symmetric contacts. For applied field strengths up to 2×104 V cm−1, the I-V characteristics are linear. The conductivity (σ) of freshly prepared films is very low (below 10−11 S cm−1 for EC6T, an oligothiophene with end-substituted 4,5,6,7-tetrahydrobenzo groups (‘end caps’) and with six thiophene units), but can be increased by four orders of magnitude on doping with oxygen (σ = 4×10−7 S cm−1), the doping process being strongly promoted by light and/or applied current. Using capacitance-voltage (C-V) spectroscopy a charge carrier density of 1017 cm−3 was measured. The temperature dependence of σ (140–320 K) can best be fitted by an exponential law (exp(αT))." @default.
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- W2078441458 date "1996-01-01" @default.
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- W2078441458 title "Electrical conductivity and oxygen doping of vapour-deposited oligothiophene films" @default.
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- W2078441458 doi "https://doi.org/10.1016/0379-6779(95)03436-n" @default.
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