Thin films of bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF), dimethyl- and trimethyl-TTF have been prepared using the thermal evaporation technique. The films were investigated using electron/optical microscopy, optical absorption spectroscopy and d.c. electrical measurements. A maximum in-plane, d.c. room temperature conductivity of 1.6 +/- 0.6 S cm(-1) was noted for iodine-doped films of BEDT-TTF. The thermal activation energy, over the range 77-300 K, was 0.028 +/- 0.02 eV for this material.