Abstract: Thin films of polycrystal CdTe were deposited on brass foil substrates by catho-dic electrodeposition.Photoelectrochemical solar cells were made of photoelectrode CdTe, counter electrode Cu₂Sand electrolyte polysulfide redox system (S + Na₂S + NaOH).Solar conversion efficiencies up to 3.6% for photoelectrochemical cell with small area were obtained.The effects of thin film uniformity, temperature and selective etch treatments on J_sc,V_oc,F_Fand efficiency η were presented, some coments or explanations were suggested also.