Effect of carbon nanotube network morphology on thin film transistor performance
- 808 Downloads
The properties of electronic devices based on carbon nanotube networks (CNTNs) depend on the carbon nanotube (CNT) deposition method used, which can yield a range of network morphologies. Here, we synthesize single-walled CNTs using an aerosol (floating catalyst) chemical vapor deposition process and deposit CNTs at room temperature onto substrates as random networks with various morphologies. We use four CNT deposition techniques: electrostatic or thermal precipitation, and filtration through a filter followed by press transfer or dissolving the filter. We study the mobility using pulsed measurements to avoid hysteresis, the on/off ratio, and the electrical noise properties of the CNTNs, and correlate them to the network morphology through careful imaging. Among the four deposition methods thermal precipitation is found to be a novel approach to prepare high-performance, partially aligned CNTNs that are dry-deposited directly after their synthesis. Our results provide new insight into the role of the network morphologies and offer paths towards tunable transport properties in CNT thin film transistors.
KeywordsCarbon nanotube network thin film transistor morphology mobility image processing hysteresis
Unable to display preview. Download preview PDF.
12274_2012_211_MOESM1_ESM.pdf (1001 kb)
- Kaskela, A.; Nasibulin, A. G.; Timmermans, M. Y.; Aitchison, B.; Papadimitratos, A.; Tian, Y.; Zhu, Z.; Jiang, H.; Brown, D. P.; Zakhidov, A., et al. Aerosol-synthesized SWCNT networks with tunable conductivity and transparency by a dry transfer technique. Nano Lett. 2010, 10, 4349–4355.CrossRefGoogle Scholar
- Hinds, W. C. Aerosol Technology: Properties, Behavior, and Measurement of Airborne Particles; Wiley-Interscience: New York, 1982.Google Scholar
- Blackburn, J. L.; M. Barnes, T. M.; Beard, M. C.; Kim, Y. H.; Tenent, R. C.; McDonald, T. J.; To, B.; Coutts, T. J.; Heben, M. J. Transparent conductive single-walled carbon nanotube networks with precisely tunable ratios of semiconducting and metallic nanotubes. ACS Nano 2008, 2, 1266–1274.CrossRefGoogle Scholar
- Necas, D.; Klapetek, P.; Anderson, C. Gwyddion 2.20; Brno: Czech Republic, 2009.Google Scholar
- MATLAB, 7.8.0347 (R2009a), MathWorks, Inc.: Natick, MA, 2009.Google Scholar
- Zeng, H.; Kristiansen, K.; Wang, P.; Bergli, J.; Israelachvili, J. Surface-induced patterns from evaporating droplets of aqueous carbon nanotube dispersions. Langmuir 2011, 27, 7163–7167.Google Scholar
- Gonzalez, R. C.; Woods, R. E.; Eddins, S. L. Digital Image Processing using MATLAB; Pearson Education: India, 2004.Google Scholar
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2012