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  • Title: Planar conjugated polymers containing 9,10-disubstituted phenanthrene units for efficient polymer solar cells.
    Author: Li G, Kang C, Li C, Lu Z, Zhang J, Gong X, Zhao G, Dong H, Hu W, Bo Z.
    Journal: Macromol Rapid Commun; 2014 Jun; 35(12):1142-7. PubMed ID: 24700381.
    Abstract:
    Four novel conjugated polymers (P1-4) with 9,10-disubstituted phenanthrene (PhA) as the donor unit and 5,6-bis(octyloxy)benzothiadiazole as the acceptor unit are synthesized and characterized. These polymers are of medium bandgaps (2.0 eV), low-lying HOMO energy levels (below -5.3 eV), and high hole mobilities (in the range of 3.6 × 10(-3) to 0.02 cm(2) V(-1) s(-1) ). Bulk heterojunction (BHJ) polymer solar cells (PSCs) with P1-4:PC71 BM blends as the active layer and an alcohol-soluble fullerene derivative (FN-C60) as the interfacial layer between the active layer and cathode give the best power conversion efficiency (PCE) of 4.24%, indicating that 9,10-disubstituted PhA are potential donor materials for high-efficiency BHJ PSCs.
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