Low-frequency current noise in electrochromic devices Academic Article uri icon


  • 1/f noise was observed in electrochromic (EC) devices capable of modulating their optical transmittance by an applied voltage. The device comprised nanoporous W oxide and Ni-V oxide films and an intervening polymer electrolyte between transparent conducting In2O3:Sn films backed by polyester foils. Current (I) 1/f noise was observed when the charged (colored) device was discharged via a resistor. The power spectral density Si at fixed frequency varied as SiI2. Continuous coloration/bleaching degraded the optical quality and homogeneity of the device and led to a concomitant increase of the 1/f noise intensity, thus indicating that 1/fnoise has the potential to serve as a quality measure for EC devices. 2008 IOP Publishing Ltd.

published proceedings


author list (cited authors)

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

citation count

  • 4

complete list of authors

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

publication date

  • April 2008