Investigating the effect of electrolyte types with various ionic liquids on the electrochromic performance of PEDOT:PSS based LbL multilayers

Okutan M., Evecan D., Yıldırım S., Özkan Zayim E., Deligöz H.

Microelectronic Engineering, cilt.234, ss.111454, 2020 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 234
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.mee.2020.111454
  • Dergi Adı: Microelectronic Engineering
  • Sayfa Sayıları: ss.111454


The objective of the study is to investigate the electrochromic performances of layer-by-layer (LbL) multilayered thin film electrode prepared from linear polyethylene imine (LPEI) and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) on PET-ITO substrate in the presence of different types of electrolytes. For this purpose, the electrochromic behaviors of (LPEI/PEDOT:PSS)10 is performed in LiClO4/ propylene carbonate (PC) and two different ionic liquids (IL) namely N-methylimidazolium tetrafluoroborate (Melm-BF4) and 2-hydroxy ethyl ammonium formate (2-HEAF), as a function of IL content and scanning rate. The optical contrast value of (LPEI/PEDOT:PSS)10 film is determined as 58.4% in the existence of 10 wt% of 2- HEAF as the electrolyte. The coloration efficiency of this film is determined as 606.7 cm2 /C, which this value was greater approximately four times than 1 M LiClO4/PC. According to the obtained results, 2-HEAF has been evaluated as a suitable electrolyte alternative for (LPEI/PEDOT:PSS)10 film due to its better optical contrast and coloration efficiency compared to other electrolytes.