TY - JOUR
T1 - Dithiopheneindenofluorene (TIF) Semiconducting Polymers with Very High Mobility in Field-Effect Transistors
AU - Chen, Hu
AU - Hurhangee, Michael
AU - Nikolka, Mark
AU - Zhang, Weimin
AU - Kirkus, Mindaugas
AU - Neophytou, Marios
AU - Cryer, Samuel J.
AU - Harkin, David
AU - Hayoz, Pascal
AU - Abdi-Jalebi, Mojtaba
AU - McNeill, Christopher R.
AU - Sirringhaus, Henning
AU - Mcculloch, Iain
PY - 2017/9/27
Y1 - 2017/9/27
N2 - The charge-carrier mobility of organic semiconducting polymers is known to be enhanced when the energetic disorder of the polymer is minimized. Fused, planar aromatic ring structures contribute to reducing the polymer conformational disorder, as demonstrated by polymers containing the indacenodithiophene (IDT) repeat unit, which have both a low Urbach energy and a high mobility in thin-film-transistor (TFT) devices. Expanding on this design motif, copolymers containing the dithiopheneindenofluorene repeat unit are synthesized, which extends the fused aromatic structure with two additional phenyl rings, further rigidifying the polymer backbone. A range of copolymers are prepared and their electrical properties and thin-film morphology evaluated, with the co-benzothiadiazole polymer having a twofold increase in hole mobility when compared to the IDT analog, reaching values of almost 3 cm2 V-1 s-1 in bottom-gate top-contact organic field-effect transistors.
AB - The charge-carrier mobility of organic semiconducting polymers is known to be enhanced when the energetic disorder of the polymer is minimized. Fused, planar aromatic ring structures contribute to reducing the polymer conformational disorder, as demonstrated by polymers containing the indacenodithiophene (IDT) repeat unit, which have both a low Urbach energy and a high mobility in thin-film-transistor (TFT) devices. Expanding on this design motif, copolymers containing the dithiopheneindenofluorene repeat unit are synthesized, which extends the fused aromatic structure with two additional phenyl rings, further rigidifying the polymer backbone. A range of copolymers are prepared and their electrical properties and thin-film morphology evaluated, with the co-benzothiadiazole polymer having a twofold increase in hole mobility when compared to the IDT analog, reaching values of almost 3 cm2 V-1 s-1 in bottom-gate top-contact organic field-effect transistors.
KW - C-H cyclization
KW - High-mobility
KW - IDT
KW - IDTT
KW - Organic field-effect transistors (OFETs)
KW - TIF
UR - http://www.scopus.com/inward/record.url?scp=85026649620&partnerID=8YFLogxK
U2 - 10.1002/adma.201702523
DO - 10.1002/adma.201702523
M3 - Article
C2 - 28731227
AN - SCOPUS:85026649620
VL - 29
JO - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
IS - 36
M1 - 1702523
ER -