Open AccessHigh Performance Solution Processed Organic Field Effect Transistors with Novel Diketopyrrolopyrrole-Containing Small Molecules
Author(s) -
Bogyu Lim,
Huabin Sun,
Jaechol Lee,
YongYoung Noh
Publication year - 2017
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/s41598-017-00277-7
Subject(s) - alkyl , side chain , siloxane , crystallinity , materials science , electron mobility , molecule , solvent , thin film transistor , electron acceptor , linker , organic field effect transistor , chemical engineering , annealing (glass) , polymer chemistry , field effect transistor , layer (electronics) , transistor , chemistry , organic chemistry , polymer , optoelectronics , nanotechnology , physics , voltage , quantum mechanics , computer science , engineering , composite material , operating system
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 cm 2 V −1 s −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.