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• W1844175399 abstract "New donor–acceptor-conjugated polymers with disilanobithiophene as the donor and dithienylbenzothiadiazole, thienopyrroledione or diketopyrrolopyrrole as the acceptor were synthesized and their optical and electrochemical properties were investigated. The polymers were black solids and showed broad absorption bands in the visible region. The most red-shifted absorption band having a maximum and an edge of 739 nm and 1.4 eV, respectively, was obtained when diketopyrrolopyrrole was used as the acceptor. The absorption bands were shifted to lower energies when the spectra of the polymers were measured as films, likely due to the interchain interaction of the polymers in the films. Cyclic voltammetry studies of the polymer films were also carried out. The highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels based on the anodic peak onsets and the optical band gaps were −5.1 to −5.5 and −3.5 to −3.7 eV, respectively, depending on the acceptor structures. Bulk heterojunction polymer solar cells that used the present polymers as host material (indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene) (PEDOT):polystyrene sulfonate (PSS)/disilane-bridged bithiophene-polymer:PC71BM/Ca/Al) were fabricated, and a maximal power conversion efficiency of 2.49% was achieved based on the polymer with bis(hexylthienyl)benzothiadiazole as the acceptor. New D-A-conjugated polymers with disilanobithiophene as the donor were synthesized and their optical and electrochemical properties and applications to bulk heterojunction polymer solar cells were investigated." @default.
• W1844175399 created "2016-06-24" @default.
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• W1844175399 date "2015-08-19" @default.
• W1844175399 modified "2023-10-14" @default.
• W1844175399 title "Synthesis of new D-A polymers containing disilanobithiophene donor and application to bulk heterojunction polymer solar cells" @default.
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• W1844175399 doi "https://doi.org/10.1038/pj.2015.61" @default.
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