Oligomers of thieno[3,4-c]pyrrole-4,6-dione: Raman spectra

Abstract

Oligothiophenes are π-conjugated compounds made by concatenation of thiophenes. [1] Due to the low aromaticity of thiophene, inter-ring π-electron delocalization is favored which has strong implication in their electro-optical properties and in their applications in organic electronic devices. [2] In despite of the plenty of oligothiophenes reported so far, new derivatives are welcome which would enhance these properties in regard of their exploitation in new devices. [3] In this presentation, we will show our latest development of oligothiophenes based on the thieno[3,4-c]pyrrole-4,6-dione (TPD, See Figure 1) units, and with different size, from a dimer to a hexamer. In particular, thieno[3,4-c]pyrrole-4,6-dione (TPD) motifs are of great interest due to their high power conversion efficiency (PCE) and its moderate short-circuit current (Jsc) in organic photovoltaic (OPV) devices, [4] when implemented in donor-acceptor polymers, making them excellent candidates for their application in polymer solar cells.