Ultrasensitive low power-consuming strain sensor based on complementary inverter composed of organic p-and n-channels

Pyo Jin Jeon, Kimoon Lee, Eun Young Park, Seongil Im, Heesun Bae

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


The use of low-strain sensors based on complementary inverters for the detection of tensile strain has been verified. Complementary inverter-type gauge circuits are comprised of a strain-sensitive bendable C26H16N2(heptazole)-based organic field-effect transistor (OFET) and a relatively strain-insensitive N,N′-ditridecyl-perylene-3,4:9,10-tetracarboxylic diimide-C13(PTCDI-C13)-based one, as p-and n-channels, respectively. This study complementary circuit showed a voltage gain of more than 10 and a relatively low static current (below 0.2 nA) at a supplied voltage of 5 V, without strain application. Using the elastic and reversible response to the tensile strain in the heptazole p-channel, the complementary inverter-type gauge circuit enabled us to achieve a high gauge factor of 90% and to measure an extremely low strain level of 0.02% under subnanowatt power dissipation conditions during the strain-sensing operation. This ultrasensitive and low power-consuming strain gauge could be highly beneficial for portable and large-area strain sensors, one of the most critical components of mobile applications.

Original languageEnglish
Pages (from-to)208-212
Number of pages5
JournalOrganic Electronics
Publication statusPublished - 2016 May 1

Bibliographical note

Funding Information:
This work was partly supported by the Korea Evaluation Institute of Industrial Technology (Grant No. 10042433-2012-11 ), NRF (NRL Program: Grant No. 2014R1A2A1A01004815 ), the BK21 Plus program, and the research funds of the Kunsan National University .

Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry


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