Synthesis and Characterization of Novel Donor-Acceptor Polymer for Polymer Solar Cell
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초록
내용
The donor-acceptor (D-A) type polymers named BDT-HT-X and BDTF-HT-X have been synthetized and characterized as donor material for bulk heterojunction polymer solar cells (PSCs). These polymers were prepared via Stille polymerization between benzodithiophene (BDT) or fluorinated BDT (BDTF) and the electron deficient unit HT-X. The BDT-HT-X and BDTF-HT-X polymers possessed the highest occupied molecular orbital (HOMO) levels ranged −5.37 to −5.42 eV and the lowest unoccupied molecular orbital (LUMO) levels ranged −3.51 to −3.49 eV, which covered a broad absorption ranges with low optical bandgaps. To evaluate the photovoltaic performances of these polymers as a donor, inverted-type PSCs based on the blend of BDT-HT-X (or BDTF-HT-X), Y6BO as an acceptor were fabricated. The power conversion efficiencies (PCEs) of the optimized OSCs reached up to 3.73% for BDT-HT-X and 3.98% for BDTF-HT-X.