An Efficient Organic‐Dye‐Sensitized Solar Cell with in situ Polymerized Poly(3,4‐ethylenedioxythiophene) as a Hole‐Transporting Material

In situ polymerized PEDOT is used as hole-transporting material to fabricate dye-sensitized solar cells (DSSCs) with an average efficiency of 6.1% (under 100 mW cm−2 AM1.5 illumination) using organic D149 dye as the sensitizer. By comparing with Z907-based devices, the excellent light response of D149-sensitized DSSCs is attributed to the broad light absorption, low photoelectron recombination, and good polymer penetration.