Co-Sensitized Mesoporous TiO2 Solar Cells: Hybrid Sensitizer of SILAR-Grown CdS Quantum Dot (QD) and Molecular Dye (Z907) with a Metal Oxide Interlayer

摘要

During the past two decades, mesoporous metal oxide film-based solar cells sensitized by molecular dyes or inorganic semiconductors have advanced greatly in terms of power conversion efficiencies and stability. As a light harvester, both molecular dyes and nanoscale semiconductors have proved that they can be utilized successfully based on their intrinsic properties and advantages. Therefore, those two chromophores have played an important role in the advancement of dye- or quantum dot-sensitized solar cells. Recently, a kind of hybrid system combining multi-components is attracting great attentions in many research areas because some synergistic effects could be expected by a combination of two or more components doing a similar or complementary role. In mesoscopic solar cells, there have also been a few trials to make a new type of hybrid sensitizers composed of inorganic QDs and organic dyes; CdSe or CdS QDs were deposited firstly and then followed by self-assembled adsorption of molecular dyes (Z907, N719, SQ) to prepare inorganic/organic hybrid sensitizer which has finally led to a moderate power conversion efficiency (<~4%) under somewhat limited conditions. These relative-