Özet
A series of new linear conjugated co-polymers, incorporating different substituted thieno[3,2-b]thiophenes (TTs) as the donor, acetylene as the π-bridge and benzothiadiazole (BT) as the acceptor units, were synthesized via palladium-catalyzed Sonogashira cross-coupling polymerization. The optical, electrochemical, and thermal properties of these conjugated polymers were evaluated via UV-vis, fluorescence, cyclic voltammetry, and thermogravimetric analysis. These readily soluble TT-BT co-polymers were employed as the semiconducting channel materials in bottom-gate, top-contact (BGTC) organic field-effect transistors (OFETs). The OFET devices showed p-channel field-effect behavior and successfully operated below −3 V in high yield. The polymeric materials comprising TTs with aliphatic side chains exhibited a better OFET performance compared with those with aromatic side chains. The OFETs using TT-BT with thienothiophene bearing a nonyl (C9H19) side chain showed the highest hole average carrier mobility in the saturation regime, μsat = 0.1 cm−2 V−1 s−1, on/off current ratio, ION/IOFF = 3.5 × 103, and the smallest subthreshold swing, SS < 200 mV dec−1. The observed differentiation in device characteristics can be beneficial in applications where selectivity is as essential as the field-effect behavior.
Orijinal dil | İngilizce |
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Sayfa (başlangıç-bitiş) | 8254-8265 |
Sayfa sayısı | 12 |
Dergi | Journal of Materials Chemistry C |
Hacim | 10 |
Basın numarası | 21 |
DOI'lar | |
Yayın durumu | Yayınlandı - 27 Nis 2022 |
Bibliyografik not
Publisher Copyright:© 2022 The Royal Society of Chemistry.
Finansman
We thank the Higher Education Council of Turkey (YOK) and TUBITAK grants to Recep Isci (PhD, 100/2000 YOK and 2211A BIDEP/TUBITAK), TGA-2021-42949 numbered ITU BAP Project, 118C365 numbered TUBITAK BIDEB 2232 Project and Unsped Global Lojistik, Turkey, for financial support.
Finansörler | Finansör numarası |
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Higher Education Council of Turkey | |
YOK | 2211A BIDEP/TUBITAK, TGA-2021-42949 |
Bilimsel Araştırma Projeleri Birimi, İstanbul Teknik Üniversitesi | 118C365 |