Conjugated systems built by connecting two electron-donor side-chains to a diketopyrrolopyrrole (DPP) core have been synthesized and evaluated as donor material in heterojunction organic solar cells. The effects of composition of the side-chain on the electronic properties of the conjugated system have been analyzed on first series of compounds containing various combinations of benzofuran, benzothiophene, thiophene ...
![3,6-Bis(5-bromo-2-thienyl)-2,5-bis(2-ethylhexyl)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione Structure](https://image.chemsrc.com/caspic/161/1000623-95-9.png)