Large-Area and Strain-Reduced Two-Dimensional Molybdenum Disulfide Monolayer Emitters on a Three-Dimensional Substrate

Chiao-Yun Chang, Hsiang-Ting Lin, Ming-Sheng Lai, Cheng-Li Yu, Chong-Rong Wu, He-Chun Chou, Shih-Yen Lin, Chi Chen, Min-Hsiung Shih*

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Atomically thin membranes of two-dimensional (2-D) transition-metal dichalcogenides (TMDCs) have distinct emission properties, which can be utilized for realizing ultrathin optoelectronic integrated systems in the future. Growing a large-area and strain-reduced monolayer 2-D material on a three-dimensional (3-D) substrate with microstructures or nanostructures is a crucial technique because the electronic band structure of TMDC atomic layers is strongly affected by the number of stacked layers and strain. In this study, a large-area and strain-reduced MoS2 monolayer was fabricated on a 3D substrate through a two-step growth procedure. The material characteristics and optical properties of monolayer TMDCs fabricated on the nonplanar substrate were examined. The growth of monolayer MoS2 on a cone-shaped sapphire substrate effectively reduced the tensile strain induced by the substrate by decreasing the thermal expansion mismatch between the 2-D material and the substrate. Monolayer MoS2 grown on the nonplanar substrate exhibited uniform strain reduction and luminescence intensity. The fabrication of monolayer MoS2 on a nonplanar substrate increased the light extraction efficiency. In the future, large-area and strain-reduced 2-D TMDC materials grown on a nonplanar substrate can be employed as novel light-emitting devices for applications in lighting, communication, and displays for the development of ultrathin optoelectronic integrated systems.

Original languageEnglish
Pages (from-to)26243-26249
Number of pages7
JournalACS applied materials & interfaces
Volume11
Issue number29
DOIs
StatePublished - 24 Jul 2019

Keywords

  • two-dimensional (2-D) material
  • transition metal dichalcogenides (TMDCs)
  • molybdenum disulfide (MoS2)
  • light Emitter
  • three-dimensional (3-D) substrate
  • FEW-LAYER MOS2
  • PHOTOLUMINESCENCE
  • RAMAN
  • SAPPHIRE

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