Temperature−pressure hybrid sensing all-organic stretchable energy harvester

Sujoy Kumar Ghosh, Tridib Kumar Sinha, Mengying Xie, Chris R. Bowen, Samiran Garain, Biswajit Mahanty, Krittish Roy, Karsten Henkel, Dieter Schmeißer, Jin Kuk Kim, Dipankar Mandal

Research output: Contribution to journalArticlepeer-review

Abstract

The design and development of intrinsically stretchable all-organic self-powered sensors concurrently perceiving temperature and pressure remain a challenge but deliver an exciting platform to realize environmentally friendly wearable electronics. In this approach, a biomimetic all-organic stretchable energy harvester is designed by a xylitol-added poly(3,4ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS/ Xyl) film as a compatible overlay electrode with polyaniline-reinforced one-dimensional aligned poly(vinylidene fluoride) hybrid electroactive soft nanowires. The gradient of elastic modulus between the electrode and the active nanowire component enables the all-organic device to manifest excellent power-generating performance under external temperature fluctuation (∼3 μW/m2 under ΔT ∼ 92 K) and mechanical force (∼31 μW/cm2 at 30 N). Importantly, the device renders simultaneous energy scavenging of temperature and pressure changes under pressing and stretching conditions (∼20%). The excellent mechanosensitivity (∼100 mV/N), fast response time (∼1 ms), outstanding mechanical and thermal stability, and good temperature resolution <10 K enable the harvester to act as an epidermal sensor, which simultaneously detects and discriminates both subtle pressure and thermal deviations exposed to an epidermis surface. The real-time recording and wireless transferring of physiological signals to a smartphone indicate an effective way to realize remote healthcare monitoring for early intervention.

Original languageEnglish
Pages (from-to)248-259
JournalACS Applied Electronic Materials
Volume3
Issue number1
Early online date19 Dec 2020
DOIs
Publication statusPublished - 26 Jan 2021

Keywords

  • All-organic
  • Energy harvester
  • Healthcare monitoring
  • Piezoelectric
  • Pyroelectric
  • Sensor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Electrochemistry

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