Full metadata record
DC FieldValueLanguage
dc.contributor.authorChiou, De-Yangen_US
dc.contributor.authorSu, Yen-Chenen_US
dc.contributor.authorHung, Kai-Enen_US
dc.contributor.authorHsu, Jhih-Yangen_US
dc.contributor.authorHsu, Tze-Gangen_US
dc.contributor.authorWu, Tung-Yuen_US
dc.contributor.authorCheng, Yen-Juen_US
dc.date.accessioned2019-04-02T05:59:11Z-
dc.date.available2019-04-02T05:59:11Z-
dc.date.issued2018-11-13en_US
dc.identifier.issn0897-4756en_US
dc.identifier.urihttp://dx.doi.org/10.1021/acs.chemmater.8b02801en_US
dc.identifier.urihttp://hdl.handle.net/11536/148488-
dc.description.abstract2-Alkyl((1))alkyl((2))-type aliphatic side chains with a branching point position at the C-2-position (such as 2-ethylhexyl or 2-octayldodecyl) have been widely implanted into numerous donor-acceptor conjugated copolymers for solution processable transistors or organic solar cells. However, the tertiary branching site located at the second carbon inevitably imposes steric hindrance that twists the main-chain coplanarity and attenuates interchain interactions. In this research, we developed a new two-dimensonal thiophene-vinylene-thiophene (TVT) derivative where a carbon-carbon triple bond is inserted between the thiophene unit and the 2-octyldodecyl group. This acetylene-incorporated TVT (aTVT) was copolymerized with 5,10-di(thiophen-2-yl)naphtho[1,2-c:5,6-c']bis-([1,2,5]thiadiazole) (DTNT) and 5,6-difluoro-4,7-di(thiophen-2-yl[benzo][1,2,5]thiadiazole (DTFBT) to form the polymers PaTVT-NT and PaTVT-FBT, respectively. PTVT-FBT, without the triple bond, was also prepared for comparison. The insertion of a linear triple bond moves the tertiary carbon away from the main chain to reduce the steric hindrance, thereby improving the main-chain coplanarity and facilitating the interchain interactions. The acetylene-incorporated copolymers show better thermal stability, red-shifted absorption spectra, stronger intermolecular aggregation, lower-lying electron affinity, and much higher solid-state crystallinity. Due to the linear and coplanar polymeric backbone supported by theoretical calculation, PaTVT-NT exhibits high crystallinity and adopts strong stacking with an edge-on orientation in the thin film evidenced by 2D-GIXRD, leading to a high p-type OFET mobility up to 1.27 cm(2) V-1 s(-1) with an on-off ratio of 9.22 X 10(5). This value represents the highest value among the NT-based polymers. PaTVT-FBT also achieved a high mobility of 0.78 cm(2) which greatly outperforms the corresponding nonacetylene PTVT-FBT counterpart. Most importantly, the preparation of 2-alkyl((1))alkyl((2))-acetylenyl side chain is synthetically feasible, which can be easily applied to create new conjugated polymers for high-performance solution-processable optoelectronics.en_US
dc.language.isoen_USen_US
dc.titleThiophene-Vinylene-Thiophene-Based Donor-Acceptor Copolymers with Acetylene-Inserted Branched Alkyl Side Chains To Achieve High Field-Effect Mobilitiesen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/acs.chemmater.8b02801en_US
dc.identifier.journalCHEMISTRY OF MATERIALSen_US
dc.citation.volume30en_US
dc.citation.spage7611en_US
dc.citation.epage7622en_US
dc.contributor.department交大名義發表zh_TW
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentNational Chiao Tung Universityen_US
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:000450696100028en_US
dc.citation.woscount0en_US
Appears in Collections:Articles