Synthesis and Photovoltaic Performance of Pyrazinoquinoxaline Containing Conjugated Thiophene-Based Dendrimers and Polymers

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• 作者：Gisela L. Schulz ; Michael Mastalerz ; Chang-Qi Ma ; Martijn Wienk ; Ren茅 Janssen ; Peter B盲uerle
• 刊名：Macromolecules
• 出版年：2013
• 出版时间：March 26, 2013
• 年：2013
• 卷：46
• 期：6
• 页码：2141-2151
• 全文大小：486K
• 年卷期：v.46,no.6(March 26, 2013)
• ISSN：1520-5835

文摘

Pyrazinoquinoxaline-based building blocks were incorporated into both 蟺-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 蟺-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.