Solid-state dye-sensitized photocell based on pentacene as a hole collector

A solid-state dye-sensitized photovoltaic cell consisting of vacuum deposited pentacene onto ruthenium dye-coated TiO2 electrode doped with iodine was fabricated. Cell delivers a short-circuit current of ∼3.6 mA cm−2 and an open-circuit voltage of ∼415 mV at 100 mW cm–2 (1.5 air mass). The efficiency and the fill factors of the above cell are ∼0.8% and ∼0.5%, respectively. Studies of the photocurrent action spectra showed that the dye is mainly responsible for this photocurrent generation. Preliminary results under extended illumination suggested that “long term” stability of the cell is promising.