Quality assessments of electrochromic devices: the possible use of 1/f current noise Academic Article uri icon


  • Electrochromic (EC) devices, capable of modulating their optical transmittance by charge insertion/extraction, were produced by laminating films comprised of nanoporous W oxide and Ni-V oxide by a polymer electrolyte and having this three-layer stack between transparent conducting In 2O3:Sn films backed by polyester foils. 1/f noise in the current (I) was observed when the charged (colored) EC device was discharged via a resistor. The power spectral density S i at fixed frequency scaled as S i I 2. Extended color/bleach cycling degraded the optical quality and homogeneity of the device and concomitantly increased the 1/f noise intensity. These initial data indicate that 1/f noise has a potential to serve as a quality measure for EC devices. 2007 Springer-Verlag.

published proceedings


author list (cited authors)

  • Smulko, J., Azens, A., Kish, L. B., & Granqvist, C. G.

citation count

  • 6

complete list of authors

  • Smulko, J||Azens, A||Kish, LB||Granqvist, CG

publication date

  • August 2007