SongtingTan
Xiangtan University, P R China
Posters & Accepted Abstracts: Chem Sci J
A series of donorâ??acceptor (Dâ??A) conjugated polymers based on alkylthienyl-substituted benzodithiophene (BDTT) as electron-rich unit, diketopyrrolopyrrole (DPP) and DPP based side chain (TTDPP) as electron-deficient units have been designed and synthesized by Stille-coupling reaction. Compared with the binary copolymers, the random terpolymers exhibited broader absorption range. By tuning the ratio of DPP and TTDPP, the photophysical, electrochemical properties, lamellar distance, Ï?â??Ï?* stacking distance and photovoltaic properties of the random terpolymers were changed dramatically. Bulk heterojunction polymer solar cells based on the as-synthesized copolymers as electron donors and (6,6)-phenyl-C61butyric acid methyl ester (PC61BM) as the acceptor were fabricated. The best power conversion efficiency (PCE) of 4.46% (a short-circuit current (Jsc) of 12.05 mA cmâ??2, an open-circuit voltage (Voc) of 0.77 V and a fill factor (FF) of 49.0%) was obtained from terpolymer P4. As well as optimization on device performance via solution vapor annealing (SVA) are investigated. The binary copolymer P2 obtained the best power conversion efficiency (PCE) of 4.74% with the Jsc of 10.63 mA cmâ??2, a high Voc of 0.88 V and a FF of 51.0%. tanst2008@163.com
Chemical Sciences Journal received 912 citations as per Google Scholar report
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