Photovoltaic devices based on electrodeposited poly(3-methylthiophene) with tin oxide as the transparent electrode

We report on the use of electrodeposited poly(3-methylthiophene) (PMeT) in photovoltaic devices. Photocurrent measurements in devices with PMeT as the active conjugated polymer layer were carried out showing that the combinat ion of Ni and tin oxide (TO) as electrode materials presents advantages rel ative to Al and TO. The choice of these electrode materials permits the car riers with the lowest mobility, the negative charge carriers, To be collect ed near the exciton generation/dissociation region, i.e. near the transpare nt TO electrode, avoiding the tendency for space charge accumulation and co nsequently the reduction of device efficiency.