TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The dye sensitive solar cell further has primary substrate, primary electroconductive film arranged between primary substrate and primary nanoparticles oxide thin film, and secondary nanoparticles oxide thin film arranged on primary nanoparticles oxide-film thin film. The primary electroconductive film and secondary electroconductive film contain indium-tin oxide or tin oxide. The primary nanoparticles oxide contains titanium oxide. The secondary nanoparticles oxide contains aluminum oxide, silicon oxide, aluminum-titanium oxide (AlxTi1-xO), and silicon-titanium oxide (SixTi1-xO). The secondary electroconductive film and tertiary electroconductive film are sequentially laminated on secondary substrate, and secondary substrate. The tertiary electroconductive film contains platinum or carbon. The dye sensitive solar cell further has sealing portion which connects the edge of the primary and secondary electrodes, and seals the electrolytic solution between primary and secondary electrodes. The electrolytic solution is electrolytic solution or gel-type polyelectrolyte solution containing iodide ion (I3-/I-). Preferred Properties: The primary nanoparticles oxide thin film has refractive index of 2.4-2.8. The secondary nanoparticles oxide thin film has refractive index of 1.2-2.8. The primary nanoparticles oxide thin film has particle size of 5-30 nm. The secondary nanoparticles oxide thin film has particle size of 5-10 nm. The polyvinylidenefluoride is N-methyl-2-pyrrolidone.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The dye further contains ruthenium complex-containing dye of formula (III)-(VI). Preferred Process: The primary nanoparticles oxide thin film and secondary nanoparticles oxide thin film are hydrothermally synthesized at 150-200 degrees C. The primary electroconductive film is formed between primary substrate and preliminary primary nanoparticles oxide. 1,2-Dimethyl-3-octyl-imidazolium iodide and iodine are dissolved in 3-methoxy propionitrile-3-methoxypropionitrile, and polyvinylidenefluoride-type polymer or its copolymer, or electrolytic solution is dissolved in 3-methoxypropionitrile solvent, to obtain electrolytic solution.