Structural Alternation Correlated to the Conductivity Enhancement of PEDOT:PSS Films by Secondary Doping

Keisuke Itoh, Yoshihisa Kato, Yuta Honma, Hiroyasu Masunaga, Akihiko Fujiwara, Satoshi Iguchi, Takahiko Sasaki

研究成果: Article査読

8 被引用数 (Scopus)

抄録

"Secondary doping" in poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is quite effective and a frequently used method for the conductivity enhancement. This simple approach, the addition of co-solvents to the PEDOT:PSS solution before film fabrication, is an essential way to derive the high electrical performance of PEDOT:PSS, but the mechanism still remains unclear. In this study, nanoscale structural changes synchronized with the conductivity enhancement via secondary doping in PEDOT:PSS films were investigated. During secondary doping with ethylene glycol near the critical dopant concentration, noncrystalized PEDOT molecules uncoupled from PSS chains and then underwent nanocrystallization. These structural changes might be the key driving force for conductivity enhancement via secondary doping.

本文言語English
ページ(範囲)13467-13471
ページ数5
ジャーナルJournal of Physical Chemistry C
123
22
DOI
出版ステータスPublished - 2019 6 6

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜

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