Solution-processable end-functionalized tetrathienoacene semiconductors: Synthesis, characterization and organic field effect transistors applications
Journal
Dyes and Pigments
Journal Volume
145
Pages
584-590
Date Issued
2017
Author(s)
Mamillapalli, N.C.
Vegiraju, S.
Priyanka, P.
Lin, C.-Y.
Luo, X.-L.
Tsai, H.-C.
Hong, S.-H.
Ni, J.-S.
Lien, W.-C.
Kwon, G.
Yau, S.L.
Kim, C.
Liu, C.-L.
Chen, M.-C.
Abstract
A series of dialkylated tetrathienoacene (TTAR)-based solution-processable small molecular organic semiconductors have been synthesized and characterized for organic field effect transistor (OFET) applications. The central dialkylated TTAR moiety was end-capped with thiophenylvinylthiophene (TVT), bithiophene (bT), and thienothiophene (TT) to afford new π-conjugated p-type active materials, DTVT-TTAR (1), DbT-TTAR (2), and DTT-TTAR (3), respectively. The physical and electrochemical properties and theoretical calculations as well as OFETs performance and thin film morphologies and microstructures of these new soluble TTARs are systematically studied. Using a solution-shearing method, DTVT-TTAR exhibits p-channel transport with the highest mobility of up to 0.18 cm2 V−1s−1 and current ON/OFF ratios of 104-106, which is one of the highest hole mobilities for the solution-processed TTAR-based small molecules.
Type
journal article