Negar Ashari Astani

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Efficient organic solar cells are based on (electron) donor-acceptor heterojunctions. An optically generated excited molecular state (exciton) is dissociated at this junction, forming a charge-transfer (CT) state in an intermediate step before the electron and hole are completely separated. The observed highly efficient dissociation of this Coulombically(More)
Two D−π−A dyes based on the dithieno[3,2-b:2′,3′-d]pyrrole π-bridge (DTP) were synthesized, characterized using UV−vis absorption spectroscopy and electrochemistry, modeled using quantum chemical calculations, and used as sensitizers in dye-sensitized solar cells (DSCs). The photoelectrochemical properties and DSC performance are thoroughly compared with(More)
Dye-sensitized solar cells (DSCs) are low-cost alternatives to conventional silicon technologies for solar energy conversion. A typical DSC is composed of a chromophore that is anchored to a mesostructured anode of anatase titania (TiO2). Upon absorption of photons, electrons are injected from the excited state of the dye into the TiO2 conduction band.(More)
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