Effect of fluorination of naphthalene diimide-benzothiadiazole copolymers on ambipolar behavior in field-effect transistors
| Autor: | Cunbin An, Ruomeng Duan, Hanna Makowska, Benlin Hu, Martin Baumgarten, Tomasz Marszalek, Wojciech Pisula |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Electron mobility Materials science Ambipolar diffusion General Chemical Engineering 02 engineering and technology General Chemistry Polymer Conjugated system 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences chemistry Side chain Moiety Cyclic voltammetry 0210 nano-technology Alkyl |
| Zdroj: | RSC advances. 8(30) |
| ISSN: | 2046-2069 |
| Popis: | Two naphthalene diimide (NDI)–benzothiadiazole (BT) based conjugated polymers with high molecular weight, P1 and P2, were synthesized by introducing F atoms to modulate the electron-donating ability of the BT moiety. 3-Decyl-pentadecyl branched alkyl side chains were employed and expected to improve the molecular organization and device performance. Both polymers have excellent solubility in common organic solvents. UV-vis-NIR absorption and cyclic voltammetry indicate that the maximum absorption wavelength of P2 is blue-shifted and the HOMO energy level of P2 is decreased in comparison with P1. Two dimensional wide angle X-ray scattering of thin films revealed a similar organization of both polymers. A less balanced transport in field-effect transistors with increased electron mobility of 0.258 cm2 V−1 s−1 and lowered hole transport of 2.4 × 10−3 cm2 V−1 s−1 was found for P2. Polymer devices of P1 exhibited a balanced ambipolar transport, with a hole mobility of 0.073 cm2 V−1 s−1 and electron mobility of 0.086 cm2 V−1 s−1. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|