TECHNOLOGY FOCUS - ELECTRONICS - Preferred Method: The electrochemical method is carried out at 23-27 degrees C. The electrodeposition voltage is 1100 mV. The electrodeposition time is 15-120 (preferably 120) minutes. The working distance is 1 cm. The drying temperature is 30 degrees C. The relative humidity is 80%. The method further comprises heat-treating the zinc ferrite thin film at 150-450 degrees C. The heat-treating step comprises: a first heating stage comprising heating the zinc ferrite thin film at 23-27 degrees C to 70-100 degrees C, at a first heating rate of 2 degrees C/minute for 30-120 minutes; a second heating stage comprising further heating the zinc ferrite thin film to 150-450 degrees C at a second heating rate of 2 degrees C/minute for 60-120 minutes; and a cooling stage comprising cooling the zinc ferrite thin film to 23-27 degrees C at a cooling rate of 2 degrees C/minute. Preferred Components: The photoelectrode further comprises a conductive material located on the surface of the conductive substrate, and the conductive material is titanium oxide, zinc oxide, copper oxide, and/or zirconia. The photosensitized solar cell further comprises a sensitized dye attached to the zinc ferrite thin film of the conductive substrate.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The electrodeposition solution comprises 10-1 M zinc nitrate aqueous solution. The electrodeposition solution comprises 10-2 M ferric nitrate aqueous solution. The transparent conductive substrate is a fluorine-doped tin oxide/glass substrate, an indium tin oxide (ITO)/glass substrate, or an ITO/polyethylene naphthalate substrate. The electrolyte is an acetonitrile solution comprising 0.5 M of lithium iodide, 0.05 M of iodine and 0.5 M of 4-tertbutylpyridine.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The conductive substrate is a conductive fabric, a transparent conductive substrate, a metal substrate, or a metal oxide substrate, in which the metal substrate is a platinum substrate or a stainless steel substrate.