Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 903 - 906 |
| Number of pages | 4 |
| Journal | Synthetic Metals |
| Volume | 41 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1991 |
| MoE publication type | A1 Journal article-refereed |
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Temperature dependence of DC-conductivity in poly(3-alkylthiophenes) in temperature regime 20-400 K. / Väkiparta, Kimmo; Moulton, J.; Heeger, A.; Smith, P.; Isotalo, Heikki; Stubb, Henrik.
In: Synthetic Metals, Vol. 41, No. 3, 1991, p. 903 - 906.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Temperature dependence of DC-conductivity in poly(3-alkylthiophenes) in temperature regime 20-400 K
AU - Väkiparta, Kimmo
AU - Moulton, J.
AU - Heeger, A.
AU - Smith, P.
AU - Isotalo, Heikki
AU - Stubb, Henrik
N1 - Project code: puo0011
PY - 1991
Y1 - 1991
N2 - We present recent results on the effect of side chain length and thermal dedoping on the temperature dependence of the conductivity above room temperature. The temperature dependence of the dc-conductivity in heavily doped poly(3-alkylthiophenes) changes above room temperature: instead of increasing with increased temperature, as at low temperatures, the conductivity decreases after reaching a maximum between 300 and 370 K. This effect is not due to thermal dedoping, which should be an irreversible process (or at least a function of both time and temperature). We propose that this maximum is caused by the disorder resulting from the thermochromic transition. Below 300 K the temperature dependence is in good agreement with thermal fluctuation induced tunneling model (σ=σ∞exp(-T1(T0+T)). We will discuss the anisotropy of conductivity in stretched samples in low temperature.
AB - We present recent results on the effect of side chain length and thermal dedoping on the temperature dependence of the conductivity above room temperature. The temperature dependence of the dc-conductivity in heavily doped poly(3-alkylthiophenes) changes above room temperature: instead of increasing with increased temperature, as at low temperatures, the conductivity decreases after reaching a maximum between 300 and 370 K. This effect is not due to thermal dedoping, which should be an irreversible process (or at least a function of both time and temperature). We propose that this maximum is caused by the disorder resulting from the thermochromic transition. Below 300 K the temperature dependence is in good agreement with thermal fluctuation induced tunneling model (σ=σ∞exp(-T1(T0+T)). We will discuss the anisotropy of conductivity in stretched samples in low temperature.
U2 - 10.1016/0379-6779(91)91523-D
DO - 10.1016/0379-6779(91)91523-D
M3 - Article
VL - 41
SP - 903
EP - 906
JO - Synthetic Metals
JF - Synthetic Metals
SN - 0379-6779
IS - 3
ER -