Open AccessСтруктурные и термоэлектрические свойства оптически прозрачных тонких пленок на основе одностенных углеродных нанотрубок
Author(s) -
И. А. Тамбасов,
A. I. Voronin,
Н.П. Евсевская,
М. Н. Волочаев,
Ю.В. Фадеев,
А. С. Крылов,
А. С. Александровский,
А.В. Лукьяненко,
С.Р. Абелян,
Екатерина В. Тамбасова
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.12.46739.086
Subject(s) - seebeck coefficient , materials science , thin film , carbon nanotube , electrical resistivity and conductivity , thermoelectric effect , transmittance , temperature coefficient , composite material , sheet resistance , analytical chemistry (journal) , nanotechnology , thermal conductivity , optoelectronics , layer (electronics) , chemistry , thermodynamics , electrical engineering , physics , engineering , chromatography
Thin films have been produced via a spray method from commercially available single-walled carbon nanotubes (SWCNTs). A SWCNT film thickness has ranged from ~10 to ~80 nm. The SWCNT diameter has accepted values of 1.6–1.8 nm. The existence of SWCNTs longer than 10 μm is established. The optimal thickness of a SWCNT thin film is found to be ~15 nm at which the transmittance exceeds 85%. The specific resistance of SWCNT thin films goes from ~1.5 × 10^–3 to ~3 × 10^–3 Ohm cm at room temperature. The pioneering study of the temperature dependences of the Seebeck coefficient and surface resistance is performed for this type of SWCNT. A surface resistance is found to increase with rising temperature. Furthermore, the Seebeck coefficient of SWCNT thin films weakly depends on temperature. Its value for all samples is evaluated to be ~40 μV/K. According to the sign of the Seebeck coefficient, thin films exhibit hole-type conductivity. Moreover, the power factor of a 15-nm thin SWCNT-film decreases with a temperature increase to 140◦C from the value of approximately ~120 to ~60 μW m^–1 K^–2. A further rise in temperature has led to a gain in the power factor.