TY - JOUR
T1 - Evaluation of the electrical conductivity of polypyrrole polymer composites
AU - Aguilar-Hernández, J.
AU - Potje-Kamloth, K.
PY - 2001/6/7
Y1 - 2001/6/7
N2 - A study of the electrical conductivity of polypyrrole-polyoxyphenylene composites (PPy-POP and PPy-POP-MPcTS) prepared by in situ electropolymerization is presented, where MPcTS stands for tetrasulfonated tetrasodium metallophthalocyanine salts and is used as a second dopand for polypyrrole. The conductivity is studied as a function of temperature in the range 77 ≤ T ≤ 300 K. The temperature dependence of the total ac conductivity, in the frequency range 102-105 Hz, changes by approximately five orders of magnitude, showing a sub-linear dispersive behaviour. The temperature dependence of the dc conductivity gives evidence for a transport mechanism based on the Mott's variable-range hopping model in one dimension for the PPy-POP composite, which shows a crossover to three dimensions for the PPy-POP-MPcTS composites. Using this model we were able to calculate meaningful values for the density of states, hopping energy and hopping distance.
AB - A study of the electrical conductivity of polypyrrole-polyoxyphenylene composites (PPy-POP and PPy-POP-MPcTS) prepared by in situ electropolymerization is presented, where MPcTS stands for tetrasulfonated tetrasodium metallophthalocyanine salts and is used as a second dopand for polypyrrole. The conductivity is studied as a function of temperature in the range 77 ≤ T ≤ 300 K. The temperature dependence of the total ac conductivity, in the frequency range 102-105 Hz, changes by approximately five orders of magnitude, showing a sub-linear dispersive behaviour. The temperature dependence of the dc conductivity gives evidence for a transport mechanism based on the Mott's variable-range hopping model in one dimension for the PPy-POP composite, which shows a crossover to three dimensions for the PPy-POP-MPcTS composites. Using this model we were able to calculate meaningful values for the density of states, hopping energy and hopping distance.
UR - http://www.scopus.com/inward/record.url?scp=0035821731&partnerID=8YFLogxK
U2 - 10.1088/0022-3727/34/11/323
DO - 10.1088/0022-3727/34/11/323
M3 - Artículo
SN - 0022-3727
VL - 34
SP - 1700
EP - 1711
JO - Journal of Physics D: Applied Physics
JF - Journal of Physics D: Applied Physics
IS - 11
ER -