Highly Conductive PEDOT:PSS Films for Transparent Electrode: Novel Methods to Improve the Conductivity of PEDOT:PSS to be Comparable to Indium Tin Oxide

New transparent conductive materials are urgently needed to replace indium tin oxide (ITO) as the transparent electrode of optoelectronic devices. Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a quite promising candidate as the next-generation transparent electrode in optoelectronic devices. However, as-prepared PEDOT:PSS from its aqueous solution suffers a problem of low conductivity of