Right On Time: Ultrafast Charge Separation Before Hybrid Exciton Formation.

ABSTRACT: Organic/inorganic hybrid systems offer great potential for novel solar cell design combining the tunability of organic chromophore absorption properties with high charge carrier mobilities of inorganic semiconductors. However, often such material combinations do not show the expected performance: while ZnO, for example, basically exhibits all necessary properties for a successful application in light-harvesting, it was clearly outpaced by TiO₂ in terms of charge separation efficiency. The origin of this deficiency has long been debated. This study employs femtosecond time-resolved photoelectron spectroscopy and many-body ab initio calculations to identify and quantify all elementary steps leading to the suppression of charge separation at an exemplary organic/ZnO interface. It i

SUBMITTER: Gierster L 

PROVIDER: S-EPMC11336905 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature