A Novel Two-Step Spin-Coating Process for Preparing PEDOT/PSS thin Films and Review of Recent Advances in Spin Coating

Author(s): Wen-Zhen Cheng, Jin-Xia Liu, Yin-Ang Mei, Ping Zhang, Takuya Omi, Yuki Takigami, Ke Zhang, Hidenori Okuzaki, Hu Yan

Journal Name: Recent Patents on Materials Science
Continued as Current Materials Science

Volume 8 , Issue 2 , 2015


Abstract:

We systematically investigated the influence of surfactant on processing PEDOT/PSS thin films by spin-coating technique. As a result, the conductivity of the PEDOT/PSS thin films prepared by the two-step spin-coating method was to be averagely ca. 400Scm-1 which was calculated with sheet resistance and thickness. On the other hand, the conductivity of the PEDOT/PSS thin films prepared by the one-step spin-coating method should be much lower than that of two-step one if assuming that the thickness is the same for the two methods. It is considerable that in the one-step spin-coating method, aggregation of PEDOT/PSS colloidal particles easily occurs before spin-coating, resulting in inhomogeneous coating film. Such inhomogeneous film would show lower conductivity. The two-step spin-coating method can avoid the aggregation and then result in homogeneous film and higher conductivity. Reviews of recent patents on wet-process techniques reported by other research groups are also reported.

Keywords: Conducting polymers, PEDOT/PSS, spin-coating, surfactants, transparent electrodes, wet-process.

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Article Details

VOLUME: 8
ISSUE: 2
Year: 2015
Published on: 11 May, 2015
Page: [176 - 182]
Pages: 7
DOI: 10.2174/1874464808666150310233622
Price: $58

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