TY - JOUR
T1 - Structural Alternation Correlated to the Conductivity Enhancement of PEDOT:PSS Films by Secondary Doping
AU - Itoh, Keisuke
AU - Kato, Yoshihisa
AU - Honma, Yuta
AU - Masunaga, Hiroyasu
AU - Fujiwara, Akihiko
AU - Iguchi, Satoshi
AU - Sasaki, Takahiko
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/6/6
Y1 - 2019/6/6
N2 - "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.
AB - "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.
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U2 - 10.1021/acs.jpcc.9b02475
DO - 10.1021/acs.jpcc.9b02475
M3 - Article
AN - SCOPUS:85066485399
SN - 1932-7447
VL - 123
SP - 13467
EP - 13471
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 22
ER -