Directional dependent piezoelectric effect in CVD grown monolayer MoS2 for flexible piezoelectric nanogenerators

Sung Kyun Kim, Ravi Bhatia, Tae Ho Kim, Daehee Seol, Jung Ho Kim, Hyun Kim, Wanchul Seung, Yunseok Kim, Young Hee Lee, Sang Woo Kim

Research output: Contribution to journalArticlepeer-review


Due to the interesting semiconducting and optical properties of transition metal dichalcogenides, they have received particular attention for novel electronics and optoelectronics. In addition it is expected that piezoelectric properties of two-dimensional (2D) layered materials are very useful to realize next generation mechanically powered transparent flexible charge-generating devices. Here we report directional dependent piezoelectric effects in chemical vapor deposition grown monolayer MoS2 for flexible piezoelectric nanogenerators (NGs). It was found that the output power obtained from the NG with the armchair direction of MoS2 is about two times higher than that from the NG with the zigzag direction of MoS2 under the same strain of 0.48% and the strain velocity of 70 mm/s. This study provides a new way to effectively harvest mechanical energy using novel flexible piezoelectric NGs based on 2D semiconducting piezoelectric MoS2 for powering low power-consuming electronics and realizing self-powered sensors.

Original languageEnglish
Pages (from-to)483-489
Number of pages7
JournalNano Energy
Publication statusPublished - 2016 Apr 1

Bibliographical note

Funding Information:
S. K. Kim and R. Bhatia contributed equally to this work. This work was financially supported by the Center for Advanced Soft-Electronics as the Global Frontier Project ( 2013M3A6A5073177 ) and Institute for Basic Science Program ( IBS-R011-D1 ) through the National Research Foundation (NRF) of Korea Grant funded by the Ministry of Science, ICT & Future Planning . Appendix A

Publisher Copyright:
© 2016 Elsevier Ltd.

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering


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