Solution processable neutral state colourless electrochromic devices: effect of the layer thickness on the electrochromic performance


Tahtali G., Has Z., Doyranli C., Varlikli C., KOYUNCU S.

JOURNAL OF MATERIALS CHEMISTRY C, cilt.4, ss.10090-10094, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 4 Konu: 42
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1039/c6tc04112d
  • Dergi Adı: JOURNAL OF MATERIALS CHEMISTRY C
  • Sayfa Sayıları: ss.10090-10094

Özet

In this study, a neutral state colourless electrochromic device fabricated through a solution process is introduced. The device contains indium doped transparent oxide coated glass as the transparent conductive electrode, poly(N-(2-ethylhexyl) carbazol-3,6-diyl) (PCbz) as the anodically colouring material, poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) as the ion storage layer and a lithium perchlorate based conducting gel electrolyte. A maximum optical contrast (Delta T%) of 58% at 800 nm is achieved by optimizing the film thickness of both the organic layers. The device that has layers of 220 nm PCbz and 120 nm PEDOT: PSS thickness revealed a high coloration efficiency (1246 cm(2) C-1) and colouring and bleaching response times of 5.6 s and 2.3 s, respectively.