Synthesis and photovoltaic performance of pyrazinoquinoxaline containing conjugated thiophene-based dendrimers and polymers

G.L. Schulz, M. Mastalerz, C.-Q. Ma, M.M. Wienk, R.A.J. Janssen, P. Bauerle

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23 Citations (Scopus)
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Abstract

Pyrazinoquinoxaline-based building blocks were incorporated into both p-conjugated dendrimers and polymers. The dendrimers were synthesized using a convergent/divergent approach whereas the donor/acceptor copolymers were synthesized via Stille cross-coupling reactions. The structurally defined dendrimers and the p-conjugated polymers were investigated with respect to their optical and electronic properties as well as their performance in photovoltaic devices. Because of the presence of the electron-deficient pyrazinoquinoxaline moiety, the absorption spectra of the materials under investigation were red-shifted with respect to the all thiophene-containing materials. Power conversion efficiencies up to 1.7 and 0.8% were obtained from blends of second-generation dendrimers and polymers with PC71BM, respectively.
Original languageEnglish
Pages (from-to)2141-2151
Number of pages10
JournalMacromolecules
Volume46
Issue number6
DOIs
Publication statusPublished - 2013

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