  Highly doped Poly(3,4-ethylenedioxythiophene) or PEDOT is a conductive
polymer with a wide range of applications in energy conversion due to its ease
of processing, optical properties and high conductivity. The latter is
influenced by processing conditions, including formulation, annealing, and
solvent treatment of the polymer, which also affects the polymer arrangement.
Here we show that the analysis of the optical spectra of PEDOT domains reveals
the nature and magnitude of the structural disorder in the material. In
particular, the optical spectra of objects on individual domains can be used
for the elucidation of the molecular disorder in oligomer arrangement which is
a key factor affecting the conductivity.
