Optical Properties and Light-Emission Device Applications of 2-D Layered Semiconductors

Yongzhuo Li, Hao Sun, Lin Gan, Jianxing Zhang, Jiabin Feng, Danyang Zhang, Cun Zheng Ning

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Two-dimensional layered semiconductors have attracted a great deal of attention recently from many fields of science and technology. This article overviews the major progress from the perspective of light-emission properties and related device applications of such 2-D materials. We begin with the overview of basic optical properties, including emission features of various excitonic complexes, many-body effects, light-emission enhancement due to plasmonic coupling, and mechanisms of optical gain. This is followed by discussions of coupling of 2-D materials with an optical cavity, including cavity-enhanced emission due to the Purcell effect, strong and weak coupling, as well as lasing behavior. We then discuss the design and the fabrication of various heterostructures by stacking layers of different 2-D materials for the purpose of confining and injecting charge carriers. Such structures are indispensable for light-emitting devices under electrical injection, the ultimate goal of any semiconductor-based light-emitting diode (LED) or lasers. The progress in electrical injection devices is reviewed next, where LEDs under lateral and vertical electrical injection schemes are discussed. The review is concluded with an outlook and future perspectives.

Original languageEnglish (US)
Article number8832249
Pages (from-to)676-703
Number of pages28
JournalProceedings of the IEEE
Issue number5
StatePublished - May 2020


  • 2-D materials
  • lasers
  • light emission
  • light-emitting diodes (LEDs)
  • light-matter interaction
  • many-body interaction
  • optical gain
  • plasmon
  • strong coupling
  • transition metal dichalcogenides (TMDCs)

ASJC Scopus subject areas

  • General Computer Science
  • Electrical and Electronic Engineering


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