الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Part I: We present a comprehensive photovoltaic study of four triphenylamine organic sensitizers with D- π -A configurations and compare their photovoltaic performances to the conventional ruthenium-based sensitizer N719. MES-1-4 are synthesized and utilized as sensitizers for dye-sensitized solar cell (DSSC) applications. The effects of the donor unit (triphenylamine), the -conjugation bridge (thiophene ring), and different acceptors (phenylacetonitrile and 2-cyanoacetamide derivatives) were studied. DFT and TD-DFT were used to explore the photophysical and electronic structures of all the studied MES-1-4 organic dyes. Part II. Three metal-free organic dyes, MES-5-7, were created by inserting furan as a π-linker between pyrene as the donor and various acceptors, namely 2-(4-nitrophenyl)acetonitrile, 2-cyano-N-(4-nitrophenyl)acetamide, and dicyanovinyl group. Part III : Synthesis of metal-free organic sensitizers is considered an effective alternative to gain low-cost sensitizers with higher efficiency for dye-sensitized solar cells (DSSCs). The synthetic pathways to novel carbazole-based organic sensitizers MES-8-11. Part IV : Carboxyphtiliamide organic dyes MES-12-16 featured with donor–π–acceptor architecture are synthesized and applied to dye-sensitized solar cells (DSSCs).