Fused Dithienogermolodithiophene Low Band Gap Polymers for High-Performance Organic Solar Cells without Processing Additives

详细信息    查看全文

• 作者：Hongliang Zhong ; Zhe Li ; Florent Deledalle ; Elisa Collado Fregoso ; Munazza Shahid ; Zhuping Fei ; Christian B. Nielsen ; Nir Yaacobi-Gross ; Stephan Rossbauer ; Thomas D. Anthopoulos ; James R. Durrant ; Martin Heeney
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：February 13, 2013
• 年：2013
• 卷：135
• 期：6
• 页码：2040-2043
• 全文大小：257K
• 年卷期：v.135,no.6(February 13, 2013)
• ISSN：1520-5126

文摘

We report the synthesis of a novel ladder-type fused ring donor, dithienogermolodithiophene, in which two thieno[3,2-b]thiophene units are held coplanar by a bridging dialkyl germanium. Polymerization of this extended monomer with N-octylthienopyrrolodione by Stille polycondensation afforded a polymer, pDTTG-TPD, with an optical band gap of 1.75 eV combined with a high ionization potential. Bulk heterojunction solar cells based upon pDTTG-TPD:PC₇₁BM blends afforded efficiencies up to 7.2% without the need for thermal annealing or processing additives.