The photoelectric effect on the interface of an immiscible media of aqueous lithium chloride solution of 5x 10-2 mol/dm3 concentration and 1,2-dichloroethane containing tetrabutylammo- nium tetraphenylborate of concentrations ranging from 1 x 10-7 mol/dm3 to 5 x 10-2 mol/dm3 was studied. The effects of temperature, light intensity, variation in light-absorbing tetraphenylborate ion concentration and of incident radiation direction on the appearing potential have been studied. The water/1,2-dichloroethane system with lithium chloride (LiCl) in aqueous phase and tet- rabutylammonium tetraphenylborate (TBATPhB) in organic phase dissolved salts has been proposed as the basic system on photochemical studies in the visible light range.