Dynamics of Electrically Driven Cholesteric Liquid Crystals by Triboelectrification and Their Application in Self-Powered Information Securing and Vision Correcting

Yung Hsin Chen, Ping Yuan Lin, Ting Wei Wang, Naveen Tiwari, Ssu Chi Lin, Hua Shan Wu, Dongwhi Choi, Wenzhuo Wu, Dukhyun Choi, Yu Cheng Hsiao, Zong Hong Lin

Research output: Contribution to journalArticlepeer-review

Abstract

Smart glass technology is rapidly evolving and finding significant application in light selectivity devices. However, a major disadvantage of such devices is their high energy requirement which hinders the commercialization progress. In this work, a self-powered optical switch is developed based on the electrochromic effect induced by a vertical contact-separation triboelectric nanogenerator (VCS-TENG) in a cholesteric liquid crystal (CLC) display. The voltage produced by the VCS-TENG causes the CLC display to transition across different physical states, viz., planar, focal conic, and homeotropic, which correspond to varying opacities and applications. Light penetration testing showed that the proposed CLC achieved a shading rate as high as 80%. Moreover, our device demonstrated high durability of up to 500 cycles. Most of all, the novel device successfully implemented reliable performance in important applications that have been demonstrated in this work, including webcam and cellphone security, and occlusion therapy devices in ophthalmology.

Original languageEnglish
Pages (from-to)3185-3194
Number of pages10
JournalACS Energy Letters
Volume6
Issue number9
DOIs
Publication statusPublished - Sep 10 2021

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

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