One-pot sequential electrochemical deposition of multilayer poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonic acid)/tungsten trioxide hybrid films and their enhanced electrochromic properties.

Citation:

Ling H, Lu J, Phua S, Liu H, Liu L, Huang Y, Mandler D, Lee PS, Lu X. One-pot sequential electrochemical deposition of multilayer poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonic acid)/tungsten trioxide hybrid films and their enhanced electrochromic properties. J. Mater. Chem. AJournal of Materials Chemistry A: Materials for Energy and Sustainability. 2014;2 (8) :2708 - 2717.

Date Published:

2014///

Abstract:

Hybrid thin films composed of multilayer poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonic acid) (PEDOT:PSS) and W trioxide (WO3) were electrochem. deposited on In Sn oxide (ITO) from a 1-pot soln. using a square-wave galvanostatic method. The morphol. of the hybrid thin films could be easily manipulated to optimize their electrochromic properties by adjusting deposition conditions. In the hybrids, both components can be simultaneously switched to colored or bleached states. The hybrid film obtained with very short deposition times of PEDOT:PSS and WO3 in each cycle exhibits significantly enhanced electrochromic properties. The optical contrast of the hybrid film is higher than that of PEDOT:PSS or WO3 films of the same thickness. Also, the stability of the hybrid film is also drastically enhanced. The enhancement may be attributed to the favorable interactions between the two components, i.e., PEDOT:PSS may enter the defect sites in electrodeposited WO3, preventing surface-defect-induced anodic dissoln. during cycling, while the surface functional groups of WO3 may act as dopants to inhibit over-oxidn. of PEDOT, as well as the large interfacial area created using this unique 1-pot multilayer deposition method. [on SciFinder(R)]

Notes:

CAPLUS AN 2014:152400(Journal; Online Computer File)