Photoconductivity of carbon nanotube obtained by arc discharge method

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Azerbaijan national oil and industry university

Photoconductivity of carbon nanotube obtained by arc discharge method

Abaszade Rashad Gabil oglu,

PhD, docent, department of electronics and automations

With the development of modern Nano science, interest in the study and study of carbon-based samples has increased. In the paper [1], R.G. Abaszade and others made the purchase of graphene-based samples by the Hummer method and the examination of the obtained samples was carried out. In [2-7,10] the structural and electrical properties of grapheme-based samples were studies were conducted for the application of these samples in solar panels. In addition to this, the application of examples in the modeling of hybrid energy systems and the modeling of voltage - ampere characteristics have been studies in detail.

On the basis of extensive research, it is intensively used in the preparation of new devices that are intensively applied in various fields of science. In addition, it is successfully used in the preparation of crystal cores of various elements in Nano electronics. The vast majority researches conducted in recent years have studied in detail the physical, chemical, mechanical, and electrical properties carbon-based nanotubes, as well as order characteristics. In the papers [7-9], the study of carbon nanotubes, carbon nanotubes doped with 10% and 15% gadolinium with different research methods, as well as their applications in the field of modern device manufacturing were studied.

In papers [11-12], the characteristic of the volt-ampere characteristic of the graphene oxide sample and its modeling were studied.

Our recent research is devoted to the photoconductive properties of CNTs. During the research, the photoconductivity spectrum of CNTs was investigated at a wavelength of A=400-900 nm and in the voltage range of 1-9V, and it was determined that the spectrum of conductivity is more intense at lower voltage.

Modeling was carried out with the help of the MATLAB program. Based on the I-V characteristic of the spectrum at Л-720 nm, it can be noted that very weak photosensitivity is observed with a 1-9V drop in the entire voltage range of the graph.

Figure shows the dependence graph of the current intensity of the studied sample on the wavelength. The photosensitivity spectra of carbon nanotubes in the range of Л=400-900 nm were described at voltages U=1V, 3V.

The photosensitivity spectra of CNTs in the wavelength range Л=400-900 nm at two values of the bias voltage U applied to the sample: U=1V and 3V. The experimental points marked «o» in blue correspond to a voltage of 1V; points marked with «x» in green correspond to - 3V.

carbon electrical energy current

As can be seen from U=1V, seven photocurrent peaks were observed in the Л=450-900 nm range and showed a fairly even distributi on: Ap1~460 nm, Ap2~540 nm, A_p3~600 nm, Л^~710 nm, Л^~765 nm, Л^-840 nm, Л^~880 nm. The highest photosensitivity Ip5~0.2 pA observed in the spectrum was obtained at Лp5~765 nm. The value of peak Лp4~710 nm is quite insignificant. The remaining peaks have a photocurrent value of the order of I~0.5-0.11 pA. Zero photosensitivity was observed in the wavelength range Л=660-740 nm (ДЛ=80 nm).

A decrease in the number of peaks described at U=3V and their intensity is observed: Лp₁~410 nm, Лp2~460 nm, Лpз~502 nm, Лp4~680nm, Лp5~755 nm, Лp6~860 nm. The maximum peak depicted in the graph appears at Лр₂~460 nm. This the value of the maximum has decreased and is Ip2~0.115 pA. As can be seen from the graph, the maximum peak shifts to the lower wavelength region and the wavelength and it is observed as zero photosensitivity in the range of Л=520-660 nm (ДЛ=140 nm), leading to the expansion of the range of zero photosensitivity.

References

[1] R.G. Abaszade, S.A. Mamedova, F.H. Agayev, S.I. Budzulyak, O.A. Kapush, M.A. Mamedova, A.M. Nabiyev, V.O. Kotsyubynsky, Synthesis and Characterization of Graphene Oxide Flakes for Transparent Thin Films, Physics and Chemistry of Solid State, Vol. 22, №3, pp. 595-601,2021.

[2] R.G. Abaszade, A.G. Mamedov, I.Y. Bayramov, E.A. Khanmamadova, V.O. Kotsyubynsky, O.A. Kapush, V.M. Boychuk, E.Y. Gur, Structural and Electrical Properties of the Sulfur - Doped Graphene Oxide/Graphite Oxide Nanocomposite, Physics and Chemistry of Solid State, Vol. 23, №2, pp. 256-260, 2022.

[3] R.A. Namazov, R.G. Abaszade, Properties of graphene based solar panels (review), Ecoenergetics, No. 1, pp.3-8, 2022.

[4] Kh.M. Popal, R.G. Abaszade, Research and modeling of hybrid energy systems (review), Ecoenergetics, №1, pp.65-69, 2022.

[5] S.R. Figarova, E.M. Aliyev, R.G. Abaszade, R.I. Alekberov, V.R. Figarov, Negative Differential Resistance of Graphene Oxide/Sulphur Compound, Journal of Nano Research Submitted, Vol. 67, pp. 25-31,2021.

[6] R.G. Abaszade, A.G. Mammadov, V.O. Kotsyubynsky, E.Y. Gur, I.Y. Bayramov, E.A. Khanmamadova, O.A. Kapush, Modeling of voltage-ampere characteristic structures on the basis of graphene oxide/sulfur compounds, International Journal on Technical and Physical Problems of Engineering, Vol.14, №2, pp. 302-306, 2022.

[7] R.G. Abaszade, A.G. Mammadov, V.O. Kotsyubynsky, E.Y. Gur, I.Y. Bayramov, E.A. Khanmamadova, O.A. Kapush, Modeling of voltage-ampere characteristic structures on the basis of graphene oxide/sulfur compounds, International Journal on Technical and Physical Problems of Engineering, Vol.14, №2, pp. 302-306, 2022.

[8] R.G. Abaszade, O.A. Kapush, A.M. Nabiyev, Properties of carbon nanotubes doped with gadolinium, Journal of Optoelectronic and Biomedical Materials, Vol. 12, №3, pp. 61 -65, 2020.

[9] R.G. Abaszade, X-ray diffraction analysis of carbon nanotubes doped by 10% gadolinium, Azerbaijan Journal of Physics, Vol. 26, No.1, section: Az, pp. 36-38, 2020.

[10] R.G. Abaszade, O.A. Kapush, S.A. Mamedova, A.M. Nabiyev, S.Z. Melikova, S.I. Budzulyak, Gadolinium doping influence on the properties of carbon nanotubes, Physics and Chemistry of Solid State, Vol. 21, №3, pp. 404-408, 2020.

[11] R.G. Abaszade, R.Y. Safarov, Growth of grapheme and applications of grapheme oxide, Ecoenergetics, №2, pp.9-15, 2022.

[12] R.G. Abaszade, Analysis of carbon nanotube doped with five percent gadolinium, Theory and practice of modern science, Collection of scientific papers «SCIENTIA», April 1, Krakow, Poland, Vol.1, pp. 82-83, 2022.

[13] R.G. Abaszade, A.G. Mamedov, I.Y. Bayramov, E.A. Khanmamadova, V.O. Kotsyubynsky, O.A. Kapush, V.M. Boychuk, E.Y. Gur, Structural and electrical properties of sulfur-dopedgraphene oxide/graphite oxide composite, Physics and Chemistry of Solid State, Vol.23, №2, pp. 256-260, 2022.

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