Shape-Morphing Chromonic Liquid Crystal Hydrogels

Shape-Morphing Chromonic Liquid Crystal Hydrogel

Donor–Acceptor Semiconducting Polymers Containing Benzodithiophene with Bithienyl Substituents

Synthesis and photovoltaic properties of two donor–acceptor polymers containing benzodithiophene with 3,3′,5-trihexylbithienyl substituents are reported. Benzo­[<i>c</i>]­[1,2,5]­thiadiazole and 5-hexylthieno­[3,4-<i>c</i>]­pyrrole-4,6-dione were used as acceptor building blocks for the synthesis of donor–acceptor polymers. The photovoltaic properties of the synthesized donor–acceptor polymers were investigated in bulk heterojunction solar cells with [6,6]-phenyl-C₆₁-butyric acid methyl ester (PCBM) acceptor

Synthesis and photovoltaic performance of donor-acceptor polymers containing benzo[1,2-<i>b</i>:4,5-<i>b</i>]dithiophene with thienyl substituents

Three alternating donor–acceptor copolymers have been synthesized by Stille coupling polymerization of 2,6-(trimethyltin)24,8-bis(5-dodecylthiophene-2-yl)benzo[1,2-b:4,5-b0] dithiophene with 1,3-dibromo-5-hexylthieno[3,4-c]pyrrole-4,6-dione, 4,7-dibromo-1,3-benzothiadiazole, and 5,7-dibromo-2,3-didodecylthieno[3,4-b]pyrazine, respectively. The synthesized polymers were tested in bulk heterojunction solar cells as blends with the acceptor [6,6]-phenyl-C₆₁-butyric acid methyl ester (PCBM). The thienopyrroledione copolymer displayed a power conversion efficiency of 3.00% which was increased to 3.86% by application of the additive 1,8-diiodooctane (DIO). Tapping mode atomic force microscopy analysis indicated that there was an increase in the phase separation between polymer and PCBM, leading to an improvement in the performance upon the addition of DIO

Synthesis and electronic properties of semiconducting polymers containing benzodithiophene with alkyl phenylethynyl substituents

Semiconducting polymers containing benzodithiophene with decyl phenylethynyl and hexadecyl phenylethynyl substituents have been synthesized by Stille coupling polymerization. The optoelectronic properties of the synthesized polymers have been investigated. The synthesized polymers were tested in bulk heterojunction solar cells