Abstract
Two donor-acceptor conjugated copolymers comprised of a novel dithienophosphole (DTP) as the acceptor unit and bithiophene (BT) or decylthiophenebenzodithiophene (DTBDT) as the donor unit were synthesized and characterized to elucidate the relationship between donor-acceptor (D-A) architecture and organic field-effect transistors (OFETs) performance. These characteristics of D-A copolymers were affected by the structural suitability of donor and acceptor units. Poly(DTP-BT) had an ordered structure that facilitated charge carrier transfer. The crystallinity of poly(DTP-BT) increased as annealing temperature (Tann) increased. In contrast, poly(DTP-DTBDT) was amorphous regardless of Tann due to the long alkyl chains of the DTBDT units. OFET devices made with poly(DTP-BT) and annealed at 200°C exhibit a highly crystalline morphology and a relatively high field-effect mobility (4.9 × 10-3 cm2/(V·s)).
| Original language | English |
|---|---|
| Pages (from-to) | 316-322 |
| Number of pages | 7 |
| Journal | Dyes and Pigments |
| Volume | 125 |
| DOIs | |
| State | Published - Feb 2016 |
Keywords
- Dithienophosphole
- Donor-acceptor (D-A) architecture
- Organic field effect transistor (OFET)
- Polymeric semiconductor
- Well ordered crystalline structure
- X-ray diffraction
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