Thin films containing tetrathiafulvalene were prepared by thermal evaporation and Langmuir-Blodgett (LB) deposition. The films were studied using d.c, electrical measurements, electron microscopy and optical absorption spectroscopy, For both types of film, an increase in electrical conductivity was observed after doping with iodine. Maximum room temperature, d.c,, in-plane conductivities of 15 +/- 3 S cm(-1) and 0.02 +/- 0.01 S cm(-1) and thermal activation energies of 0.09 +/- 0.02 eV and 0.25 +/- 0.02 eV over the range 77-300 K were measured for evaporated and LB films respectively. A comparison of the two types of film is made.