Enhancing Optoelectronic Performance of Randomly Oriented Single-Walled Carbon Nanotube Films
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School of Science |
Doctoral thesis (article-based)
| Defence date: 2019-10-04
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Authors
Date
2019
Major/Subject
Mcode
Degree programme
Language
en
Pages
82 + app. 47
Series
Aalto University publication series DOCTORAL DISSERTATIONS, 176/2019
Abstract
Randomly oriented single-walled carbon nanotubes (SWCNTs) in the form of films are a promising material for various optoelectronic and photonic applications, including actual flexible and stretchable, transparent and conductive electrodes. However, the optoelectronic performance of as-synthesized SWCNT films still needs to be improved in order to provide industry-required conductivity characteristics. In this thesis, several novel approaches are introduced to enhance the optoelectronic properties of the films by an adsorption doping technique. The first approach based on the creation of a hybrid graphene/SWCNT material allowed us to reduce the sheet resistance by introducing a large area π-stacking interaction between the carbon nanomaterials. The second one is devoted to the optimization of an adsorption doping technique with a correct selection of a dopant solvent in which the evaporation rate is the most important parameter to control the optoelectric properties of the SWCNT films. The final one presents an aerosol-assisted approach that focuses on a uniform, controllable, and reproducible doping which leads to fine-tuning of the SWCNT film work function and conductivity. Additionally, the optical properties of the as-synthesized and doped nanotubes were extensively studied using broad wavelength non-destructive spectroscopies and optical pumping with a terahertz probe. The first study contributes and confirms the observable spectral effects for free carriers described in the Drude conductivity model. The second one identifies strong negative photoconductivity in both pristine and doped nanotubes. As a result, each of these cases leads to the creation of the SWCNT films that exhibit superior properties. This opens up numerous breathtaking opportunities for today and upcoming devices.Description
The doctoral dissertation is conducted under a convention for the joint supervision of thesis at Aalto University (Finland) and Skolkovo Institute of Science and Technology (Russia) for the degree of Doctor of Science (Technology) at Aalto University.
Supervising professor
Kauppinen, Esko I., Prof., Aalto University, Department of Applied Physics, FinlandNasibulin, Albert G., Prof., Skolkovo Institute of Science and Technology, Russia
Keywords
SWCNT, TCF, optoelectronic performance, adsorption doping, fine-tuning
Other note
Parts
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[Publication 1]: Tsapenko, A.P., Goldt, A.E., Shulga, E., Popov, Z.I., Maslakov, K.I., Anisimov, A.S., Sorokin, P.B. Nasibulin, A.G. Highly conductive and transparent films of HAuCl4-doped single-walled carbon nanotubes for flexible applications. Carbon, 2018, 130, pp. 448-457.
DOI: 10.1016/j.carbon.2018.01.016 View at publisher
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[Publication 2]: Tsapenko A.P., Romanov S.A., Satco D.A., Krasnikov D.V., Rajanna P.M., Danilson M., Volobujeva O., Anisimov A.S., Goldt A.E., Nasibulin A.G. Aerosol-assisted fine-tuning of optoelectrical properties of SWCNT films. The Journal of Physical Chemistry Letters, 2019, 10, 14, p. 3961-3965.
DOI: 10.1021/acs.jpclett.9b01498 View at publisher
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[Publication 3]: Burdanova, M.G., Tsapenko, A.P., Satco, D.A., Kashtiban, R.J., Mosley, C., Monti, M., Staniforth, M., Sloan, J., Gladush, Y., Nasibulin, A.G., Lloyd-Hughes, J. Giant negative terahertz photoconductivity incontrollably doped carbon nanotube networks. ACS Photonics, 2019 6 (4), 1058-1066.
DOI: 10.1021/acsphotonics.9b00138 View at publisher
- [Publication 4]: Zhukova, E.S., Grebenko, A.K., Bubis, A.V., Prokhorov, A.S., Belyanchikov, M.A., Tsapenko, A.P., Gilshteyn, E.P., Kopylova, D.S., Gladush, Y.G., Anisimov, A.S., Anzin, V.B. Terahertz-infrared electrodynamics of single-wall carbon nanotube films. Nanotechnology, 2017, 28(44), p. 445204.DOI: 10.1088/1361-6528/aa87d1
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[Publication 5]: Gorkina, A.L., Tsapenko, A.P., Gilshteyn, E.P., Koltsova, T.S., Larionova, T.V., Talyzin, A., Anisimov, A.S., Anoshkin, I.V., Kauppinen, E.I., Tolochko, O.V., Nasibulin, A.G. Transparent and conductive hybrid graphene/carbon nanotube films. Carbon, 2016, 100, pp. 501-507.
DOI: 10.1016/j.carbon.2016.01.035 View at publisher