Investigation of Poly(Cyclopentadithiophenes) as Electron Donor Materials for Organic Solar Cells

We present the synthesis and investigation of poly(4,4-dialkylcyclopentadithiophene)-2,6-diyls (PACPDTs) as electron donor materials in organic bulk heterojunction solar cells in combination with the fullerene derivatives [60]PCBM and [70]PCBM. It was shown that the length of alkyl side chains attached to the polymer backbone affects significantly the active layer morphology and also influence to some extent on the photovoltaic performance. Spectroelectrochemical measurements performed for PACPDTs proved the potential of these polymers to be applied in electrochromic devices.