Heat treatment of poly nickel phthalocyanine leads to a charge transfe
r and hence there is an improvement in conductivity by 5 orders of mag
nitude. DC electrical conductivity measurements have been carried out
in the heat-treated samples in the temperature range 270 K-10 K. Mott'
s variable range hopping conduction in one dimension is observed in th
e temperature range 270 K-77 K and the conductivity remains constant i
n the temperature range 77 K-10 K.