(CdS)(X)(Bi2S3)(1-X) composite thin films were chemically deposited using simple successive ionic layer adsorption and reaction (SU-AR) method onto glass and fluorine doped tin oxide (FTO) coated glass substrates. The films were annealed in air at 200 degreesC for 2 hand used to fabricate photoelectrochemical cells of configuration: (CdS)(X)(Bi2S3)(1-X)/Na2S-S-NaOH/C and their properties, such as current-voltage (I-V), photovoltaic output, spectral response, capacitance-voltage (Mott-Schotttty plots), etc. It is found that the (CdS)(X)(Bi2S3)(1-X) composite thin films are photoactive. The effect of composition 'X' on these properties was studied.