Fully flexible and transparent piezoelectric touch sensors based on ZnO nanowires and BaTiO<inf>3</inf>-added SiO<inf>2</inf> capping layers

MoolKyul Kang, Jae Hyun Park, Kyoung Il Lee, Jin Woo Cho, Joonho Bae, Byeong Kwon Ju, Churl Seung Lee

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We report on fully flexible and transparent piezoelectric touch sensors based on ZnO nanowires (NWs). Their piezoelectric properties are further enhanced by incorporating BaTiO<inf>3</inf> into the capping layer on nanowires. Flexibility is improved by a highly transparent carbon nanotubes-silver nanowires electrode. A BaTiO<inf>3</inf>-based capping layer on ZnO nanowires demonstrates a large increase of the output voltage (3.3 V) from the touch sensor compared to the voltage (50 mV). Mechanical bending tests reveal that the BaTiO<inf>3</inf>-added capping layer did not show significant degradation in change of resistance. Our results suggest that the piezoelectric touch sensors are promising for next-generation flexible touch sensors, wearable, and rollable touch panels.

Original languageEnglish
Pages (from-to)2005-2011
Number of pages7
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume212
Issue number9
DOIs
Publication statusPublished - 2015 Sep 1

Keywords

  • BaTiO<inf>3</inf>
  • capping layers
  • flexible devices
  • nanowires
  • optical transparency
  • piezoelectric properties
  • touch sensors
  • ZnO

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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