Li, Yaowen published the artcileNovel low-bandgap oligothiophene-based donor-acceptor alternating conjugated copolymers: synthesis, properties, and photovoltaic applications, Related Products of alcohols-buliding-blocks, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (2010), 48(13), 2765-2776, database is CAplus.
A series of novel soluble donor-acceptor low-bandgap-conjugated polymers consisting of different oligothiophene (OTh) coupled to electron-accepting moiety 2-pyran-4-ylidenemalononitrile (PM)-based unit were synthesized by Stille or Suzuki coupling polymerization The combination of electron-accepting PM building block with varied OThn (the number of thiophene unit increases from 3 to 5) results in enhanced π-π stacking in solid state and intramol. charge transfer (ICT) transition, which lead to an extension of the absorption spectra of the copolymers. Cyclic voltammetry measurements and MO distribution calculations indicate that the highest occupied MOs (HOMO) energy levels could be fine-tuned by changing the number of thiophene units of the copolymers, and the resulting copolymers possessed relatively low HOMO energy levels promising good air stability and high-open circuit voltage (Voc) for photovoltaic application. Bulk heterojunction photovoltaic devices were fabricated by using the copolymers as donors and (6,6)-Ph C61-butyric acid Me ester as acceptor. The highest Voc reached 0.94 V, and the short circuit currents (Jsc) were improved from 1.78 to 2.54 mA/cm2, though the power conversion efficiencies of the devices were measured between 0.61 and 0.99% under simulated AM 1.5 solar irradiation of 100 mW/cm2, which indicated that this series copolymers can be promising candidates for the photovoltaic applications.
Journal of Polymer Science, Part A: Polymer Chemistry published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C20H28B2O4S2, Related Products of alcohols-buliding-blocks.
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