title: High Performance Solution Processed Organic Field Effect Transistors with Novel Diketopyrrolopyrrole-Containing Small Molecules.
abstract: The donor-acceptor (D-A)-type diketopyrrolopyrrole (DPP)-based small molecules (LGC-D117 and LGC-D118) were synthesized and used as the active layer of solution-processable organic field-effect transistors (OFETs). Both LGC-D117 and LGC-D118 contain silaindacenodithiophene as electron-donor units with DPP as an electron-accepting linker, and octylrhodanine as the electron-accepting end group. The molecules were functionalized with different side chains to study their effects on OFET characteristics. LGC-D117 has a simple branched alkyl side chain, whereas LGC-D118 features a bulky siloxane-terminated hybrid alkyl chain. The siloxane side chains of LGC-D118 account for its better crystallinity, leading to significantly high field-effect mobility (max 3.04 cm2V-1s-1). In particular, LGC-D118 is well soluble and sustains the high mobility in the environmentally friendly 2-methyltetrahydrofuran solvent with low temperature annealing at 100 °C due to the bulky siloxane-terminated alkyl side chain.
authors.affiliation: Future Technology Research Center, Corporate R&D, LG Chem Research Park, 188, Moonji-ro, Yuseong-gu, Daejeon, 34122, Republic of Korea.
authors.forename: Bogyu
authors.initials: B
authors.lastname: Lim
authors.affiliation: Department of Energy and Materials Engineering, Dongguk University, 30 Pildong-ro, 1-gil, Jung-gu, Seoul, 04620, Republic of Korea.
authors.forename: Huabin
authors.identifier: 0000-0002-8465-7151
authors.initials: H
authors.lastname: Sun
authors.affiliation: Future Technology Research Center, Corporate R&D, LG Chem Research Park, 188, Moonji-ro, Yuseong-gu, Daejeon, 34122, Republic of Korea.
authors.forename: Jaechol
authors.initials: J
authors.lastname: Lee
authors.affiliation: Department of Energy and Materials Engineering, Dongguk University, 30 Pildong-ro, 1-gil, Jung-gu, Seoul, 04620, Republic of Korea. yynoh@dongguk.edu.
authors.forename: Yong-Young
authors.identifier: 0000-0001-7222-2401
authors.initials: YY
authors.lastname: Noh