NEW TRANSPARENT, COLORLESS, METALLICALLY CONDUCTIVE POLYMER-FILMS ANDTHEIR ELECTROCHEMICAL TRANSFORMATIONS

New surface conductive polymer composite films exhibiting extraordinar y properties: high conductivity with metallic temperature dependence a nd exceptionally high transparency are presented. The conducting netwo rks in these materials are formed of plate-like nanocrystals of bis(et hylenedioxy)tetrathiafulvalene (BEDO-TTF) salts with iodine or bromine . The films with bromine salts are colorless and transparent while tho se with iodine are colored. It is demonstrated that colored films with (BEDO-TTF)/iodine networks can be electrochemically transformed into highly transparent, practically colorless materials without deteriorat ion of the conducting network. The resulting metallically conducting p olymer materials show the highest transparency among conductive compos ites reported so far.