Synthesis and characterization of NiO-Ta2O5 nanocomposite electrode for electrochromic devices

Hyo Jin Ahn, Hee Sang Shim, Youn Su Kim, Chan Young Kim, Tae Yeon Seong

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

NiO-Ta2O5 nanocomposite electrodes have been synthesized using an RF magnetron co-sputtering system, and their electrochemical and electrochromic properties have been compared with those of single NiO electrodes. Transmission electron microscopy results show that crystalline NiO nano-dots (3-8 nm in size) are embedded in a Ta 2O5 matrix. X-ray photoelectron spectroscopy results reveal the formation of Ni oxidized states (NiO) and Ta oxidized states (Ta 2O5). Electrochromic devices fabricated with the nanocomposite electrodes produce high optical modulation (41-95%), fast response time (colored: 3-4 s, bleached: 1 s), high coloration efficiency (ca. 30.5 cm2 C-1) and good durability, which are much better than those of ones made with the single NiO electrode.

Original languageEnglish
Pages (from-to)567-571
Number of pages5
JournalElectrochemistry Communications
Volume7
Issue number6
DOIs
Publication statusPublished - 2005 Jun 1
Externally publishedYes

Keywords

  • Co-sputtering
  • Durability
  • Electrochromic
  • Nano-dots
  • NiO
  • TaO

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

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