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Structural Tuning of Low Band Gap Intermolecular Push/Pull Side-chain Polymers for Organic Photovoltaic Applications 被引量:2
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作者 Ansuman Nayak P.S. Rama Sreekanth +1 位作者 santosh kumar sahu Duryodhan sahu 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2017年第9期1073-1085,共13页
A series of novel low band gap donor-acceptor (D-A) type organic co-polymers (BT-F-TPA, BT-CZ-TPA and BT-SI-TPA) consisting of electron-deficient acceptor blocks both in main chains (M1) and at the pendant (M2... A series of novel low band gap donor-acceptor (D-A) type organic co-polymers (BT-F-TPA, BT-CZ-TPA and BT-SI-TPA) consisting of electron-deficient acceptor blocks both in main chains (M1) and at the pendant (M2) were polymerized with different electron rich donor (M3-M5) blocks, i.e., 9,9-dihexyl-9H-fluorene, N-alkyl-2,7-carbazole, and 2,6-dithinosilole, respectively, via Suzuki method. These polymers exhibited relatively low band gaps (1.65-1.88 eV) and broad absorption ranges (680-740 nm). Bulk heterojunction (BHJ) solar cells incorporating these polymers as electron donors, blended with [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) or [6,6]-phenyl-Cvl-butyric acid methyl ester (PC71BM) as electron-acceptors in different weight ratios were fabricated and tested under 100 mW/cm2 of AM 1.5 with white-light illumination. The photovoltaic device containing donor BT-SI-TPA and acceptor PC71BM in 1:2 weight ratio showed the best power conversion efficiency (PCE) value of 1.88%, with open circuit voltage (Voc) = 0.75 V, short circuit current density (Jsc) = 7.60 mA/cm2, and fill factor (FF) = 33.0%. 展开更多
关键词 Polymer solar cells Low band gap Conducting polymers Charge transfer DONOR-ACCEPTOR Bulk heterojunctionsolar cell
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