New Fused Bis-Thienobenzothienothiophene Copolymers and Their Use in Organic Solar Cells and Transistors

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• 作者：Laure Biniek ; Bob C. Schroeder ; Jenny E. Donaghey ; Nir Yaacobi-Gross ; Raja Shahid Ashraf ; Ying W. Soon ; Christian B. Nielsen ; James R. Durrant ; Thomas D. Anthopoulos ; Iain McCulloch
• 刊名：Macromolecules
• 出版年：2013
• 出版时间：February 12, 2013
• 年：2013
• 卷：46
• 期：3
• 页码：727-735
• 全文大小：523K
• 年卷期：v.46,no.3(February 12, 2013)
• ISSN：1520-5835

文摘

A new tetradodecyl-substituted DTBTBT donor unit is synthesized by a specific bis-annulation via Suzuki鈥揗iyaura coupling and successfully incorporated into light absorbing electron donor copolymers for OPV and hole and electron transport OFET polymer devices. All copolymers (DTBTBT-co-benzothiadiazole (Bz), DTBTBT-co-thiophene (T) and DTBTBT-co-thienothiophene (TT)) show fully coplanar backbones and strong intermolecular interactions. The DTBTBT-Bz copolymer led to a deep HOMO level (鈭?.2 eV) and thus a large V_oc value of 0.92 V with PC₇₁BM as electron acceptor and a PCE of 3.7% with a J_sc of 6.78 mA/cm² could be obtained. A hole mobility of 0.1 cm²/(V s) has been observed for the highly coplanar and more crystalline DTBTBT-T copolymer.