Improved photoconductive properties of composite nanofibers based on aligned conjugated polymer and single-walled carbon nanotubes
- 551 Downloads
We successfully address the challenge of aligning single-walled carbon nanotubes (SWNTs) and conjugated polymer chains in composite nanofibers for enhancing their opto-electrical properties. A pore-filling template strategy has been developed to prepare such nanocomposites from SWNTs and poly(para-phenylene vinylene) (PPV) chains, with both species well-oriented aligned along the pore axis. Addition of the SWNTs leads to a remarkable increase in photocurrent of four orders of magnitude as compared to equivalent pristine PPV nanofibers. Further analysis indicates that the strong photocurrent enhancement is not simply an effect of alignment, but additionally benefits from alignment-enhanced interaction of polymer chains with SWNTs, as supported by density functional theory (DFT) calculations.
KeywordsTubular nanocomposites single-walled carbon nanotube (SWNT) photoconductivity transport properties conjugated polymer density functional theory (DFT) calculation
Unable to display preview. Download preview PDF.
- Nalwa, H. S. Handbook of Organic Electronics and Photonics; American Scientific Publishers: Valencia, 2008.Google Scholar
- Woo, H. S.; Czerw, R.; Webster, S.; Carroll, D. L.; Ballato, J.; Strevens, A. E.; O’Brien, D.; Blau, W. J. Hole blocking in carbon nanotube-polymer composite organic light-emitting diodes based on poly (m-phenylene vinylene-co-2,5-dioctoxy-p-phenylene vinylene). Appl. Phys. Lett. 2000, 77, 1393–1395.CrossRefGoogle Scholar
- Hoppe, H.; Sariciftci, N. S. Polymer solar cells. Adv. Polym. Sci. 2008, 214, 1–86.Google Scholar
- Futaba, D. N.; Hata, K.; Yamada, T.; Hiraoka, T.; Hayamizu, Y.; Kakudate, Y.; Tanaike, O.; Hatori, H.; Yumura, M.; Iijima, S. Shape-engineerable and highly densely packed single-walled carbon nanotubes and their application as super-capacitor electrodes. Nat. Mater. 2006, 5, 987–994.CrossRefGoogle Scholar