Fully flexible and transparent piezoelectric touch sensors based on ZnO nanowires and BaTiO3-added SiO2 capping layers

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

Research output: Contribution to journalArticlepeer-review

16 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 BaTiO3 into the capping layer on nanowires. Flexibility is improved by a highly transparent carbon nanotubes-silver nanowires electrode. A BaTiO3-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 BaTiO3-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
  • ZnO
  • capping layers
  • flexible devices
  • nanowires
  • optical transparency
  • piezoelectric properties
  • touch sensors

ASJC Scopus subject areas

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

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