Functional polyelectrolyte nanospaced MoS2 multilayers for enhanced photoluminescence

Piljae Joo, Kiyoung Jo, Gwanghyun Ahn, Damien Voiry, Hu Young Jeong, Sunmin Ryu, Manish Chhowalla, Byeong Su Kim

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

Molybdenum disulfide (MoS2) multilayers with functional polyelectrolyte nanospacing layers are presented. Taking advantage of the facile method of layer-by-layer (LbL) assembly, individual chemically exfoliated MoS2 layers are not only effectively isolated from interlayer coupling but also doped by functional polymeric layers. It is clearly demonstrated that MoS2 nanosheets separated by polymeric trilayers exhibit a much larger increase in photoluminescence (PL) as the number of layers is increased. The enhanced PL has been correlated to the ratio of excitons to trions with the type of polymeric spacers. Because uniform heterogeneous interfaces can be formed between various transition metal dichalcogenides and other soft materials, LbL assembly offers possibilities for further development in the solution-processable assemblies of two-dimensional materials.

Original languageEnglish
Pages (from-to)6456-6462
Number of pages7
JournalNano letters
Volume14
Issue number11
DOIs
Publication statusPublished - Nov 12 2014

Keywords

  • MoS
  • Two-dimensional materials
  • dopant
  • exciton
  • layer-by-layer assembly
  • photoluminescence

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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