Tahtali, GurhanHas, ZeynepDoyranli, CeylanVarlikli, CananKoyuncu, Sermet2019-10-272019-10-2720162050-75262050-75342050-75262050-7534https://doi.org/10.1039/c6tc04112dhttps://hdl.handle.net/11454/33285In 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.en10.1039/c6tc04112dinfo:eu-repo/semantics/openAccessArticle4421009010094WOS:000387229000023Q1Q1