Phase transformations of ET polyiodides leading to superconducting polymer in situ composites

Conducting in situ composites made by two-step reticulate doping of polymers with ET polyiodides show several exceptional characteristics like high conductivity at low dopant amount, transparency and easiness of production in a form of large-area, flexible films. The most interesting finding is that the ET polyiodides forming the crystalline network can be transformed into the superconducting β-phase of ET2I3, yielding polymer composites showing the transitions to superconducting state at low temperatures. Systematic studies on the phase structure of the as-obtained films and on conditions controlling the transformation into the superconducting form were performed allowing optimization of the key parameters like composition, temperature, time and atmosphere of annealing.