Description PBDT-TBP is a conducting polymer with benzodithiophene (BDT) donor groups and thieno[3,4-c]pyrrole-4,6(5H)-dione acceptor groups. It has π bridges that can be synthesized by palladium (Pd) catalyzed Stille-coupling. These π-conjugations are used to enhance the optical and electrochemical properties of the polymer.OPV Device Structure: ITO/PEDOT:PSS/PTB7 :PC61BM/Ca/AlJSC = 8.1 mA/cm2VOC = 0.87 VFF = 0.56PCE = 4.0%PBDT-TBP is a donor-acceptor polymer which can be used in the fabrication of bulk heterojunction solar cells (BHJ-SCs).High-Efficiency Organic Solar Cells (OPVs); devices prepared from mixed solvents chlorobenzene/1; 8-diiodooctane