TITLE:
The Polar Solvent Application Method for Organic Transparent Conductive Film Produced by an Inkjet Printing Method
AUTHORS:
Atsushi Nitta, Naohiko Chosa, Kazuhiro Takeda
KEYWORDS:
PEDOT:PSS, Inkjet Printing, Transparent Conductive Film, Flexible Devices
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.10 No.1,
January
16,
2020
ABSTRACT: In recent years, flexible electronic devices have
attracted much attention. Accordingly, flexible transparent conductive films
are being researched actively. The commonly used indium tin oxide (ITO)
transparent conductive film has limited flexibility. Therefore, we focused on
poly(3,4-ethylenedioxythio- phene)/poly(styrenesulfonate)(PEDOT:PSS)
as a substitute material for ITO and are engaged in producing flexible
transparent conductive film using inkjet printers. To improve the
characteristics of the transparent conductive film
produced by inkjet printing, based on prior research, we found that cleaning the film substrate with ultraviolet/ozone (UV/O3) and
post-deposition annealing and treatment using polar solvents are
effective for thin films. In this study, we examined the method of applying the
polar solvent. As a result, we were able to improve the homogeneity of the thin
film surface by applying the polar solvent to each thin film lamination layer.
The resulting characteristics obtained for a three-layer printed PEDOT:PSS thin
film with polar solvent coating were resistivity of 1.49 × 10-3 Ω·cm and transmittance of 84.6%. However, we found that the surface condition
changed depending on the processing method, affecting the rate of visible light
transmittance.