| 摘要 |
PROBLEM TO BE SOLVED: To provide a photochemical cell capable of converting optical energy into electric energy at high conversion efficiency by using a chlorophyll complex, which is stable with respect to light, as negative electrode active substance and an acid solution of an oxidant made of metal salt having a large redox potential as positive electrode active substance. SOLUTION: Platinum metal such as platinum or palladium is used for a negative electrode. Gold or platinum is used for a positive electrode, a surface area of each of the electrodes is enlarged, thereby obtaining a mesh capable of achieving an increase in reaction current. A chlorophyll complex as negative electrode active substance is dissolved in a neutral phosphate buffer solution in an electrolyte on a negative electrode side. An acid solution or dissolved oxygen of an oxidant made of metal salt having a larger redox potential is used as positive electrode active substance. When the negative electrode is irradiated with light, the chlorophyll complex is excited to emit electrons, whereby a current flows between the positive electrode and the negative electrode, thereby continuously generating a recycle reaction of the active substance. Consequently, it is possible to provide a photochemical cell capable of converting optical energy into electric energy at high conversion efficiency by absorbing visible light. |
