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Synthesis and Optoelectronic Properties of Chemically Modified Bifluorenylidenes.

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The development of new light harvesting materials is a key issue for the progress of the research on organic & hybrid photovoltaics. Here, we report a new class of organic sensitizers based on the bi-fluorenylidene moiety as π-linker within the donor–π-linker–acceptor (D–π–A) scheme. The new dyes are endowed with electron donor and electron acceptor units at strategic positions in order to improve their electronic and light-harvesting properties.The comprehensive study of these compounds through the use of different experimental and theoretical techniques, provides an in-depth 15 understanding of their electronic and photophysical properties, and reveal their interest as photovoltaic materials.

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