Date : 2013. 5. 23, 4:30 PM Place : Mogam Hall, Bldg.500 -Abstract- Recently, organic DSCs have received considerable attention as they offer design flexibility, high molar extinction coefficients of dyes, and the potentially low cost of fabrication compared with those based on ruthenium dye sensitizers. However, DSCs require new dye molecule design and device architecture concepts to achieve new record energy conversion efficiencies and then to realize commercial products. To achieve this aim, molecular design strategy is quite important. Also, the traditional iodine/triiodide electrolyte system has a number of significant problems such as health hazards, volatile solvents, corrosive properties and very complex redox chemistry that need to be removed if the technology is to be commercialised. To solve these problems, unique donor-acceptor organic dyes were developed with a new electrolyte system and showed very promising results in organic DSC devices. In particular, one of those developed dyes (TH-D3), in organic DSC devices exhibits over 7.5% photo conversion efficiency (PCE)1 with a ferrocene/ferrocenium electrolyte (Fc) system while devices with the traditional iodine/triiodide electrolyte achieved 6.1% PCE.