Tuning s-SWNT@PFO networks for optoelectronics

Étienne Gaufrès (1) , P. Gagnon (2) , Laurent Alvarez (1) , Matthieu Paillet (1) , Thierry Michel (1) , Ahmed Azmi Zahab (1) , R. Martel (2) , Nicolas Izard (1)

1 L2C - Laboratoire Charles Coulomb
2 RQMP - Regroupement Québécois sur les Matériaux de Pointe

The rise of efficient extraction techniques triggered a renewal of interest in semiconducting carbon nanotube (s-SWNT) research. It represents a great interest for optoelectronics, with outstanding properties in field-effect transistor, and s-SWNT ability to efficiently emit light in the near-IR range. In particular, the hybrid system polyfluorene (PFO) wrapped s‑SWNT (s-SWNT@PFO) display strong photoluminescence, and could be coupled with photonic devices such as microring resonators to control photoluminescence linewidth and enhance photoluminescence intensity. The main challenge for using s-SWNT@PFO in optoelectronics lies in the difficulty to establish good electrical contact with a PFO embedded carbon nanotube, and existing studies only focused on optical pumping of carbon nanotube networks, without addressing issues of electrical driving. We propose to investigate these issues using suspended s-SWNT@PFO networks. The network formation process allow to control nanotube density, while the amount of remaining metallic nanotube in the network could be adjusted at the extraction phase. A selective annealing process under low pressure is used to tune PFO wrapping around the nanotubes. The resulting s-SWNT@PFO networks are then probed by AFM, Raman spectroscopy, absorption, photoluminescence and electrical experiments.

Domaines: Optique / photonique; Optique [physics.optics]; Science des matériaux [cond-mat.mtrl-sci]

Étienne Gaufrès, P. Gagnon, Laurent Alvarez, Matthieu Paillet, Thierry Michel, et al.. Tuning s-SWNT@PFO networks for optoelectronics. NT16 - The Seventeenth International Conference on the Science and Application of Nanotube, Aug 2016, Vienna, Austria. ⟨hal-01930018⟩