Synthesis of a novel fused thiophene-thieno3,2-bthiophene-thiophene Donor Monomer and Co-polymer for Use in OPV and OFETs

摘要

The synthesis of a novel fused hexacyclic electron rich monomer incorporating thieno3,2-bthiophene is reported and characterized by single crystal X-ray diffraction. Suzuki co-polymerization with benzothiadiazole (BT) afforded a novel low band-gap polymer P4TBT with high molecular weights and good solution processability. Bulk heterojunction solar cell devices using the P4TBT and 70PCBM gave power conversion efficiencies of 2.5. Top-gate, bottom-contact field effect transistors (FETs) using P4TBT displayed high hole mobilities of 0.07 cm~2 · Vs~(-1) demonstrating the suitability of the novel monomer and polymer for use in high performing organic electronic devices.