Modulating Photoluminescence of Monolayer Molybdenum Disulfide by Metal–Insulator Phase Transition in Active Substrates

Jiwei Hou, Xi Wang, Deyi Fu, Changhyun Ko, Yabin Chen, Yufei Sun, Sangwook Lee, Kevin X. Wang, Kaichen Dong, Yinghui Sun, Sefaattin Tongay, Liying Jiao, Jie Yao, Kai Liu, Junqiao Wu

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

The atomic thickness and flatness allow properties of 2D semiconductors to be modulated with influence from the substrate. Reversible modulation of these properties requires an “active,” reconfigurable substrate, i.e., a substrate with switchable functionalities that interacts strongly with the 2D overlayer. In this work, the photoluminescence (PL) of monolayer molybdenum disulfide (MoS2) is modulated by interfacing it with a phase transition material, vanadium dioxide (VO2). The MoS2 PL intensity is enhanced by a factor of up to three when the underlying VO2 undergoes the thermally driven phase transition from the insulating to metallic phase. A nonvolatile, reversible way to rewrite the PL pattern is also demonstrated. The enhancement effect is attributed to constructive optical interference when the VO2 turns metallic. This modulation method requires no chemical or mechanical processes, potentially finding applications in new switches and sensors.

Original languageEnglish (US)
Pages (from-to)3976-3984
Number of pages9
JournalSmall
DOIs
StatePublished - Aug 3 2016

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Keywords

  • interference
  • molybdenum disulfide
  • phase transition
  • photoluminescence
  • vanadium dioxide

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

Cite this

Hou, J., Wang, X., Fu, D., Ko, C., Chen, Y., Sun, Y., Lee, S., Wang, K. X., Dong, K., Sun, Y., Tongay, S., Jiao, L., Yao, J., Liu, K., & Wu, J. (2016). Modulating Photoluminescence of Monolayer Molybdenum Disulfide by Metal–Insulator Phase Transition in Active Substrates. Small, 3976-3984. https://doi.org/10.1002/smll.201601021