成果報告書詳細
管理番号20110000000607
タイトル*平成22年度中間年報 最先端研究開発支援プログラム/低炭素社会に資する有機系太陽電池の開発/高効率有機薄膜太陽電池の作製(色素増感型太陽電池の完全固体化の研究開発)
公開日2011/8/5
報告書年度2010 - 2010
委託先名株式会社リコー
プロジェクト番号P09026
部署名新エネルギー部
和文要約和文要約等以下本編抜粋:1.研究開発の内容及び成果等 サブテーマ(14)-4 一般的な色素増感太陽電池は、多孔質チタニア電極上に増感色素が吸着され、対向電極との間にヨウ素電解液が満たされた構造をしている。このヨウ素電解液は優れた特性を示す一方、液体であるが故の欠点も多い。このヨウ素電解液を用いない完全固体型として、CuI、CuSCN、spiro型HTMなどが知られているが、ヨウ素電解液に比較して特性が低いのが現状である。
英文要約Title: Funding Program for World-Leading Innovative R&D on Science and Technology / Development of organic photovoltaics toward a low-carbon society / Research and Development of Organic Thin-Film Solar Cells and their Organic Semiconductors (FY2010-FY2011) FY2010 Annual Report
General dye-sensitized solar cells has iodine electrolyte between sensitized dye on the porous titanium oxide electrode and the Pt counter electrode. Although iodine electrolyte is the good performance, it has many week points. We have studied hole-transport materials for organic transistors and organic photoreceptors, and investigated the hole-transport material applied to the solid-state dye-sensitized solar cells.
Resistance of general organic materials is high and more high transport ability is hoped for. We investigated the introduction of the acceptor framework into the organic hole-transport materials, which is the purpose of causing weak charge transport interaction to intermolecular.
HT25 which introduced acceptor framework into the hole-transport material, which observed red shift in the UV-Vis absorption spectrum and large shift of ionization potential in the AC-2 measurements as compared with not including acceptor framework. Photovoltaic performances of solid-state dye-sensitized solar cell using HT25 is improved by increase of short-circuit current density and open-circuit voltage. Contrary to expectations the increase of resistance has observed by measure of Cole-Cole plot.
Energy diagram shows the solid-state dye-sensitized solar cells in the figure. The HOMO-level of sensitized dye on titanium oxide electrode is about 5.5eV in N719, about 5.3eV in D358. Therefore, HOMO-level of the hole-transport material considered from the diagram assumed about 5.2eV. However, the hole-transport material that introduces the acceptor framework indicates the value of about 5.7eV, which is incomprehensible phenomenon. We want to clarify the mechanism of the improved photovoltaic performance by introducing of the acceptor framework, and get more design guidelines of the hole-transport material.
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