Baek, Myung-Jin published the artcileLow band gap conjugated polymers consisting of alternating dodecyl thieno[3,4-b]thiophene-2-carboxylate and one or two thiophene rings: Synthesis and photovoltaic property, SDS of cas: 239075-02-6, the publication is Synthetic Metals (2010), 160(11-12), 1197-1203, database is CAplus.
In order to develop conjugated polymers with low band gaps and deep HOMO levels, copolymers consisting of alternating dodecyl thieno[3,4-b]thiophene-2-carboxylate and one (DTT-T1) or two thiophene rings (DTT-T2) were synthesized. The estimated optical band gap and HOMO level of DTT-T1 and DTT-T2 were ∼1.58/1.61 and ∼-5.15/-5.20 eV, resp., indicating that the polymers have relatively low band gaps and deep HOMO levels, as compared to many other reported polymers. Photovoltaic devices were fabricated using DTT-T2 and a fullerene derivative (PCBM), and whose power conversion efficiency was 0.21% under the illumination of AM 1.5 (100 mW/cm2). The low conversion efficiency of the devices was attributed to the inefficiency of exciton formation due to the low absorption coefficient and self-quenching of the polymer and the un-optimized device conditions.
Synthetic Metals 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, SDS of cas: 239075-02-6.
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