Synthesis of poly(2,5-Thienylene Vinylene) and its derivatives: Low band gap materials for photovoltaics

Synthesis and electronic energy‐level regulation of imide‐fused poly(thienylene vinylene) derivatives

“…8,21 This can be attributed to the lower HOMO levels of the polymers due to the electron-withdrawing imide substituents. The PCE (0.23%) of the PSCs based on P24 was close to that of typical PTVs, [17][18][19][20][21] indicating that one-third imide substitution of the thiophene units in P24 influences the photovoltaic performance of the polymers very little.…”

“…However, power conversion efficiency (PCE) of bulk heterojunction (BHJ) PSCs based on PTVs as donor were rather low (0.2-0.3%). [17][18][19][20] Huo et al synthesized poly(3-carboxylated thienylenevinylene) (P3CTV) 21 with an electronwithdrawing carboxylate substituent, which possesses lower HOMO energy level and enhanced fluorescence. The PCE of the PSCs based on P3CTV as donor reached 2.01%.…”

Synthesis and Optical and Electronic Properties of Thiophene Derivatives

“…Instead, we reduced the 2-acid-5-ester-thiophenes to the symmetric thiophene-2,5-dimethanols, shown as series 1. Related thiophene-2,5-dimethanols have been synthesized previously, [38][39][40] and the synthesis of 1b has been reported by Nakayama [41] and Chandra. [42] We gently oxidized series 1 using MnO 2 [43] to yield thiophene-2,5-dicarbaldehydes, series 2, in nearly quantitative yields.…”

“…[42] We gently oxidized series 1 using MnO 2 [43] to yield thiophene-2,5-dicarbaldehydes, series 2, in nearly quantitative yields. Several thiophene-2,5-dicarbaldehyde examples [39,[44][45][46][47][48][49][50] have been synthesized over the last twenty years, including fused aromatics thiophenes. Specifically, the synthesis of 2b has been previously reported.…”

Femtosecond transient absorption dynamics in low bandgap polymer solar cell materials including poly(thienylenevinylene) derivative and benzothiadiazole moiety

“…In recent years, several kinds of low bandgap polymers have been proposed in order to extend an absorption spectrum more than the absorption range of conventional poly(3-hexylthiophene-2,5-diyl) (P3HT) based polymers. Typically, a concept of alternatively arranged donor and acceptor moieties is applied to reduce the bandgap of polymers [4][5][6][7].…”