Diketopyrrolopyrrole based molecular materials : synthesis, optical characterization, and application in photovoltaics

Organic p-conjugated oligomers and polymers are versatile materials for application in optoelectronics, e.g. photovoltaic cells. The electronic structure of the lower excited states in these materials, which determine the optoelectronic properties, can be controlled by distinct synthetic design. The strategy used throughout the thesis, consists of design, modification, synthesis and optical characterization of well known diketopyrrolopyrrole (DPP) and isodiketopyrrolopyrrole (iDPP) low molecular weight materials and p-conjugated polymers.