Energy Saving Electrochromic Polymer Windows with a Highly Transparent Charge-Balancing Layer

Younghoon Kim, Haijin Shin, Minsu Han, Seogjae Seo, Woojae Lee, Jongbeom Na, Chihyun Park, Eunkyoung Kim

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Highly transparent TiO2 nanoparticles are explored as a non-electrochromic (non-EC) charge-balancing layer for a high color contrast, bistable electrochromic window (ECW). The TiO2 nanoparticle (TNP) layer increases the potential at the EC polymer electrode, thereby lowering the working voltage of the ECW. This leads to lower the power consumption of ECWs without loss in the high color contrast (ΔT > 72%) and to remarkably improve the cyclability (ΔT change <1% over 3000 cycles), mainly due to the low overvoltage (<0.1 V) on the electrochromic polymer layer. Furthermore, the ECWs including the non-EC TNP layer show long-term bistability (>2.7 h, 40% increase) and UV stability (ΔT change <1%) to provide a low-power automatic ECW. This finding shows that the charge balanced ECP window has the potential to be used for an energy saving ECW with low-power consumption and will be widely applied in various ECWs as well as electrochemical devices with multiple functions.

Original languageEnglish
Article number1701192
JournalAdvanced Functional Materials
Volume27
Issue number31
DOIs
Publication statusPublished - 2017 Aug 18

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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