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We demonstrated the effective structural control of the conjugation length and various donor moieties using thiophene and selenophene derivatives in a regular terpolymer system and compared the properties with two copolymers of PDPP-SS and PDPP-TT. The three different terpolymers are composed of diketopyrrolopyrrole (DPP)-based polymers such as PDPP-TTS, PDPP-TSS, and PDPP-TTSS. The optical and electronic...
Two D–A alternating π-conjugated copolymers bearing diketopyrrolopyrrole (DPP) and sextetthiophene with different molecular weights were synthesized to investigate their physical properties and performance in thin-film transistors and photovoltaic cells. The solubility and molecular weight (MW) of these copolymers with a highly rigid backbone were improved by controlling the feeding ratio of the monomer...
We synthesized new diketopyrrolopyrrole (DPP)-based small molecules i.e., TVT(DPP) 2 and NDT(DPP) 2 , containing (E)-1,2-di(thiophen-2-yl)ethene and naphtho[1,2-b:5,6-b′]dithiophene, respectively, as electron-donating moieties with almost identical conjugation lengths. To study the effect of the conjugation bridge between the DPP units on the performance of thin-film transistors (TFTs)...
Novel two-dimensional π-conjugated molecules, i.e., 5′,5″′-((9,10-bis((4-hexylphenyl)ethynyl)anthracene-2,6-diyl)bis(ethyne-2,1-diyl))bis(5-hexyl-2,2′-bithiophene) (2,6-HBT) and 5′,5″′-((2,6-bis((4-hexylphenyl)ethynyl)anthracene-9,10-diyl)bis(ethyne-2,1-diyl))bis(5-hexyl-2,2′-bithiophene) (9,10-THB) were successfully synthesized and utilized as highly soluble p-type organic semiconductors for organic...
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