Optoelektronik uygulamalar için özgün fonksiyonel organik malzemeler geliştirilmesi

In the first chapter, we review the historical and recent advances in the design and proposal of organic semiconductors and their (opto)electronic applications. In the second chapter of this thesis, we discovered the nanostructured film construction and Raman signal enhancement capabilities of a π-electron deficient low-LUMO BTBT molecule, 1,10-(benzo[b]benzo[4,5]thieno[2,3-d]thiophene-2,7-diyl)bis(octan-1-one) (D(C7CO)-BTBT), which includes 2,7-dicarbonyl functionalization along with n-heptyl (-n-C7H15) substituents. This molecule is arranged on the gram-scale in ambient via simplistic Friedel-Crafts acylation and precipitation/solvent washing without demanding any high-cost transition-metal catalyst and monotonous chromatographic/sublimation-based purification. In the third chapter of this thesis, we demonstrated the Hansen solubility approach to study the solubility behavior of an ambient-stable n-type semiconductor, 2,2'-(2,8-bis(3-dodecylthiophen-2-yl)indeno[1,2-b]fluorene-6,12-diylidene)dimalononitrile (β,β'-C12-TIFDMT), and to analyze potential green solvents for thin-film processing. In the fourth chapter of this thesis, present a unique molecular engineering on the BTBT π-system by employing mono-(aryl)carbonyl functionalization with one hexyl (n-C6H13) substituent, and demonstrate the design, synthesis, and characterization of a new asymmetric BTBT semiconductor, m-C6PhCO-BTBT. The new molecule was produced in gram-scale through a two-step transition-metal-free synthesis, and the detailed structural, physicochemical, and (opto)electronic characterizations were performed.