TY - JOUR
T1 - A timely synthetic tailoring of biaxially extended thienylenevinylene-like polymers for systematic investigation on field-effect transistors
AU - Yoo, Dohyuk
AU - Nketia-Yawson, Benjamin
AU - Kang, Seok Ju
AU - Ahn, Hyungju
AU - Shin, Tae Joo
AU - Noh, Yong Young
AU - Yang, Changduk
N1 - Publisher Copyright:
© 2014 Wiley-VCH Verlag GmbH & Co. KGaA.
PY - 2015/1/28
Y1 - 2015/1/28
N2 - Considering there is growing interest in the superior charge transport in the ( E )-2-(2-(thiophen-2-yl)-vinyl)thiophene (TVT)-based polymer family, an essential step forward is to provide a deep and comprehensive understanding of the structure-property relationships with their polymer analogs. Herein, a carefully chosen set of DPP-TVT-n polymers are reported here, involving TVT and diketopyrrolopyrrole (DPP) units that are constructed in combination with varying thiophene content in the repeat units, where n is the number of thiophene spacer units. Their OFET characteristics demonstrate ambipolar behavior; in particular, with DPP-TVT-0 a nearly balanced hole and electron transport are observed. Interestingly, the majority of the charge-transport properties changed from ambipolar to p-type dominant, together with the enhanced hole mobilities, as the electron-donating thiophene spacers are introduced. Although both the lamellar d-spacings and π-stacking distances of DPP-TVT-n decreased with as the number of thiophene spacers increased, DPP-TVT-1 clearly shows the highest hole mobility (up to 2.96 cm2 V-11 s-1) owing to the unique structural conformations derived from its smaller paracrystalline distortion parameter and narrower plane distribution relative to the others. These in-depth studies should uncover the underlying structure-property relationships in a relevant class of TVT-like semiconductors, shedding light on the future design of top-performing semiconducting polymers.
AB - Considering there is growing interest in the superior charge transport in the ( E )-2-(2-(thiophen-2-yl)-vinyl)thiophene (TVT)-based polymer family, an essential step forward is to provide a deep and comprehensive understanding of the structure-property relationships with their polymer analogs. Herein, a carefully chosen set of DPP-TVT-n polymers are reported here, involving TVT and diketopyrrolopyrrole (DPP) units that are constructed in combination with varying thiophene content in the repeat units, where n is the number of thiophene spacer units. Their OFET characteristics demonstrate ambipolar behavior; in particular, with DPP-TVT-0 a nearly balanced hole and electron transport are observed. Interestingly, the majority of the charge-transport properties changed from ambipolar to p-type dominant, together with the enhanced hole mobilities, as the electron-donating thiophene spacers are introduced. Although both the lamellar d-spacings and π-stacking distances of DPP-TVT-n decreased with as the number of thiophene spacers increased, DPP-TVT-1 clearly shows the highest hole mobility (up to 2.96 cm2 V-11 s-1) owing to the unique structural conformations derived from its smaller paracrystalline distortion parameter and narrower plane distribution relative to the others. These in-depth studies should uncover the underlying structure-property relationships in a relevant class of TVT-like semiconductors, shedding light on the future design of top-performing semiconducting polymers.
KW - Diketopyrrolopyrrole
KW - Organic field-effect transistors
KW - Paracrystalline distortion parameters
KW - Plane distribution
KW - Thienylenevinylene
UR - http://www.scopus.com/inward/record.url?scp=85027953507&partnerID=8YFLogxK
U2 - 10.1002/adfm.201403527
DO - 10.1002/adfm.201403527
M3 - Article
AN - SCOPUS:85027953507
SN - 1616-301X
VL - 25
SP - 586
EP - 596
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 4
ER -