Electrosyntheses of freestanding and conducting polyselenophene films

High-quality freestanding polyselenophene (PSe) films with conductivity as high as 2.8×10−1 S/cm were electrochemically deposited on stainless steel electrode from distilled boron trifluoride diethyl etherate (BFEE) containing 20 mM selenophene. As-formed polymer films were homogenous and flexible and could be easily cut into various desired shapes. To the best of our knowledge, this is the first case for the preparation of high-quality PSe films.