Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 27, Issue 14, Pages 1105-1109Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200600323
Keywords
cross-conjugated polymers; low bandgap polymers; poly(indenofluorene); poly(diindenonaphthalene); synthesis; UV-Vis spectroscopy
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Semiconducting polymers with moderate HOMO-LUMO energy gaps between 1.5 and 2.0 eV are of increasing attraction as donor components of bulk heterojunction type organic solar cells. The synthesis and characterization of a novel cross-conjugated, aromatic polymer, poly(diindenonaphthalene)PDIN, with a HOMO-LUMO gap of ca. 1.6 eV (lambda(max): 724 nm) in comparison to poly(indenofluorene) PIF, a previously described, structurally related polymer, is presented. the replacement of the central benzene ring of PIF by a naphthalene moiety in PDIN leads to an increase of the optical bandgap energy of ca. 0.16 eV.
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