In situ polymerization of amphiphilic diacetylene for hole transport in solid state dye-sensitized solar cells

Solid state dye-sensitized solar cells were fabricated using polydiacetylene as the hole transport material. The polydiacetylene was incorporated into the nanoporous TiO2 film by solution casting of an amphiphilic diacetylene and subsequent in situ polymerization. Polydiacetylenes as prepared via solid state polymerization are crystalline, exhibiting high charge carrier mobility. Our preliminary experiments demonstrated a short-circuit current density of 3.73 mA/cm2 and an overall power conversion efficiency of 0.62% under AM 1.5 illumination (100 mW/cm2).