TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The chemical deposition is carried out in a chemical deposition solution comprising potassium aminotriacetate (NTA) and cadmium (Cd2+). In the method, the: temperature for the formation of the cadmium selenide-quantum dots is 5-50 degrees C; and time for the formation of the cadmium selenide-quantum dots is 100-280 minutes. Preferred Components: The substrate electrode is transparent. The substrate is glass or a transparent flexible polymer and the substrate electrode includes fluorine-doped tin dioxide, tin-doped indium oxide, or aluminum-doped zinc oxide, or the substrate electrode is formed of a flexible polymer coated with fluorine-doped tin dioxide, tin-doped indium oxide, or aluminum-doped zinc oxide. The flexible substrate is poly(ethylene terephthalate) coated with tin-doped indium oxide, or poly(ethylene naphthalate) coated with tin-doped indium oxide. The titanium dioxide layer is a patterned layer formed from a titanium dioxide paste with an acid additive. The ratio of NTA to Cd2+ is 1-2, preferably1.4-1.6. The selenium source in the chemical deposition solution comprises sodium selenosulfate. The device further comprises a counter electrode and an electrolyte. The counter electrode comprises a platinum film on a substrate, and is flexible and transparent. EXAMPLE - Patterned mesoscopic titanium dioxide photoelectrode was formed on a conductive substrate from a titanium dioxide paste with an acid additive. A small aliquot of titanium dioxide suspension (with acid additive, for low temperature annealing) was spread onto transparent electrode using a glass rod with adhesive tape as a spacer. Then, the electrodes were heated at 120 degrees C for 20 minutes on a hotplate. The mesoscopic titanium dioxide film on a substrate (electroconductive thin film) was immersed in 1M ammonium fluoride solution for 3-5 minutes, removed and washed with deionized water. Solutions of potassium aminotriacetate/cadmium (NTA/Cd) in a ratio of 1-2 were prepared using cadmium sulfate with the concentration of cadmium at 0.2 M. The obtained NTA/Cd solution (2 ml) and 2 ml of sodium selenosulfate solution in 11 ml deionized water were placed in a bottle, and the ammonium fluoride-treated electroconductive film was placed in the bottle, and the bottle was placed in a thermostated water bath. The water bath was at a temperature for the chemical bath deposition solution to synthesize and deposit cadmium selenide-quantum dots onto the titanium dioxide films for sensitizing cadmium selenide quantum dot sensitized titanium dioxide films. After a sufficient time for deposition of the cadmium selenide quantum dot, the cadmium selenide quantum dot sensitized titanium dioxide films were removed from the deposition solution, washed with deionized water, and immersed in ammonium fluoride (1M) solution for 3-5 minutes.