Microscopically crumpled indium-tin-oxide thin films as compliant electrodes with tunable transmittance

Hui Yng Ong, Milan Shrestha, Gih Keong Lau*

*Corresponding author for this work

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

Indium-tin-oxide (ITO) thin films are perceived to be stiff and brittle. This letter reports that crumpled ITO thin films on adhesive poly-acrylate dielectric elastomer can make compliant electrodes, sustaining compression of up to 25 ×25% equi-biaxial strain and unfolding. Its optical transmittance reduces with crumpling, but restored with unfolding. A dielectric elastomer actuator (DEA) using the 14.2 ×14.2% initially crumpled ITO thin-film electrodes is electrically activated to produce a 37% areal strain. Such electric unfolding turns the translucent DEA to be transparent, with transmittance increased from 39.14% to 52.08%. This transmittance tunability promises to make a low-cost smart privacy window.

Original languageEnglish
Article number132902
JournalApplied Physics Letters
Volume107
Issue number13
DOIs
StatePublished - 28 Sep 2015

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