Flexible nanogenerators for self-powered touch and light sensor applications

Keun Young Lee, Dukhyun Choi, Jae Young Choi, Sang Woo Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Here we report a flexible piezoelectric nanodevices (nanogenerators) that can be utilized as both a touch sensor and a light sensor on a single platform. Based on the electron transporting and piezoelectric properties of ZnO, nanogenerators with a ZnO/conjugated polymer stacked structure was designed on a plastic substrate. Piezoelectric touch signals were demonstrated under independent and simultaneous operations with respect to photo-induced charges (photodetection). Different levels of piezoelectric output signals from different magnitude of touching pressures suggest new user-interface functions from our hybrid nanogenerators. From a signal controller, the decoupled performance of a hybrid nanogenerator as a touch sensor and a light sensor was confirmed. Our hybrid approach does not require additional assembling processes for such multiplex systems of a touch sensor and a light sensor since we utilize the coupled material properties of ZnO and output signal processing. Moreover, it should be noted that the hybrid nanogenerator can be operated in a self-powered mode without any power supply.

Original languageEnglish
Title of host publicationQuantum Sensing and Nanophotonic Devices VIII
Publication statusPublished - 2011
EventQuantum Sensing and Nanophotonic Devices VIII - San Francisco, CA, United States
Duration: 2011 Jan 232011 Jan 27

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceQuantum Sensing and Nanophotonic Devices VIII
Country/TerritoryUnited States
CitySan Francisco, CA

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Flexible nanogenerators for self-powered touch and light sensor applications'. Together they form a unique fingerprint.

Cite this