Open AccessElectromagnetic characterisation of multi‐wall carbon nanotube–doped fluorine tin oxide for transparent antenna applications
Author(s) -
Sadat Saeid,
ShokoohSaremi Mehrdad,
Mirsalehi Mir Mojtaba,
BagheriMohagheghi MohammadMehdi
Publication year - 2019
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2018.5877
Subject(s) - materials science , tin oxide , carbon nanotube , sheet resistance , optoelectronics , transparent conducting film , doping , conductivity , coaxial , thin film , transmittance , permittivity , layer (electronics) , substrate (aquarium) , antenna (radio) , relative permittivity , dielectric , composite material , nanotechnology , electrical engineering , chemistry , oceanography , geology , engineering
Here, the authors present an improved transparent conducting thin film by adding multi‐wall carbon nanotube (MWCNT) to fluorine tin oxide (FTO). The use of carbon nanotubes considerably increases the surface conductivity of the FTO thin film. The resulting composition is deposited on a Pyrex substrate by the spray pyrolysis technique. Measurement results show high optical transmittance (about 77%) in the visible region and low electrical surface resistance (as low as 5 Ω/ ◻ ). The electromagnetic characteristics of the resulting layer ( σ , ε r ) are obtained over 0.1–20 GHz using the open‐ended coaxial probe (OECP) method. The conductivity ( σ ) is in the order of 10 5 ( S / m ) and relative permittivity ( ε r ) is in the order of 10 6 at low frequencies and in the order of 10 5 at high frequencies, which is suitable for transparent antenna applications. To verify the measurements, the layer is numerically simulated using the obtained experimental data. The simulation results were found to be in good agreement with the experimental ones.