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色素増感太陽電池の構成，発電原理及び今後の技術開発動向について述べた。
色素増感太陽電池は多孔質酸化チタン，ルテニウム色素と電解液により構成されている。純度の低い材料の使用や高温と真空プロセスが不要のため，低コストの可能性が見込まれる。その光電変換メカニズムは植物の光電変換プロセスに似ており，光の捕捉と電子伝導が別々の場所（色素とチタニア）で行われているため，光電変換が効率的であり，10％程度の変換効率が達成された。実用化するための課題としては，変換効率および信頼性の向上があげられる。
We have developed the dye-sensitized solar cell which consists of porous film made by titanium dioxide nanoparticles, the monolayer of photosensitized dye absorbed on the film, and an iodine-iodide electrolyte. The cell offers the hope of a reduction in the cost of solar electricity because of low-cost materials and processes. The dye-sensitized solar cell differs from the conventional solar cell in that it separates the function of light absorption from charge carrier transport. Charge is generated on the dye and electron and hole are transported in titanium dioxide and electrolyte, so that it exhibits an energy-conversion efficiency of 10%. However, remaining problems of the present solar cell are how to increase the efficiency and to improve reliability issues arising from the leaks of liquid electrolyte in long-term operation.
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