Proceedings of nanoGe September Meeting 2015 (NFM15)
Publication date: 8th June 2015
Subnanometric metal clusters (CLs) are particles smaller than 2 nm in diameter, consisting of groups of atoms with well-defined compositions and geometry. In these species, quantum effects are responsible for totally new chemical, optical and electronic properties, such as magnetism, photoluminescence or catalytic activity [1]. They can be synthesized through wet chemistry methods and their high stability, in addition to the already reported high photocatalytic activity in oxidation of organic molecules [2] and hydrogen production [3], make the CLs good candidates for photovoltaic applications. The fabrication of a photovoltaic cell whose working electrode is made of a transparent and conducting film of silver nanofibers, sensitized by Ag CLs of the appropriate bandgap size, eliminates de need of an intermediate semiconductor interface and any Schottky barrier. Only metal-metal interfaces are left, which promise great incident photon-to-electron conversion efficiency. In this presentation, the results of the preliminary measurements with this photovoltaic scheme are shown.
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