成果報告書詳細
管理番号20130000000535
タイトル*平成24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2014/5/17
報告書年度2012 - 2012
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
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-FY2013) FY2012 Annual Report
Ricoh Company, Ltd.

Organic solar cells based on surface complexes formed of TiO2 with TCNQ compounds are novel solar cells operating by interfacial charge-transfer transitions between the metal oxide semiconductor and organic molecules. A supercritical CO2 fluid was applied to the process where TCNQ was adsorbed to TiO2 in these solar cells. IR spectrum was confirmed that TCNQ and TiO2 formed interfacial charge-transfer transition under supercritical CO2 fluid.
A solution adsorption and supercritical CO2 fluid (for 50℃ and 20MPa and 20 minutes) were compared. When the solution adsorption and supercritical fluid were adsorbed by 3mM, the PV characteristic showed almost the same result. Then, solar cell which adsorbed with the saturated TCNQ solution under a supercritical fluid showed highly efficient PV characteristics.
In solid state dye sensitized solar cell, filling of the hole-transport material in porous TiO2 electrode is important. Because of good filling to be expected, supercritical CO2 was applied to the filling of the hole-transport layer. The same material (dye: D102, HTM: spiro-OMeTAD) as the report of the Gratzel group was used. Though the open-circuit voltage of device characteristics under supercritical fluid was low, the short-circuit current density was higher than the Gratzel group. The conversion efficiency of this device under supercritical fluid obtained 4.2% almost equal to Gratzel group.
After this, the hole-transport material that is appropriate for a supercritical fluid process was found.
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