1,3-Dibromo-5-octyl-4H-thieno[3,4-c]pyrrole-4,6(5H)-dione is a thienopyrrolodione (TPD) based electron acceptor material (n-type semiconductor) which is used widely for organic photovoltaic (OPV) applications. They have very powerful electron withdrawing capability. TPD based conjugated polymers have exhibited a Power Conversion Efficiency (PCE) of as high as 7.3% in bulk heterojunction polymer solar cells.