Bismuth tellurium selenide (Bi2Te3-ySey) films have been electrochemically grownin a conventional three electrode cell. The addition of different components to the bath, namely Sodium Lignosulfonate (SLS) and Ethylendiaminetetraacetic Acid (EDTA) and their influence in morphology, stoichiometry, structure and Seebeck coefficientwas studied in order to improve the thermoelectric performance of Bi2Te3-ySey films. Films grown with SLS presented high crystallographic orientation and improved morphology, while those grown in the presence of EDTA had higher concentration of bismuth. The combination of both additives gave rise to stoichiometric Bi2Te2.7Se0.3films with denser morphology, higher orientation and higher Seebeck coefficients (60% larger) when compare with films grown without additives.