標題: Large-Area and Strain-Reduced Two-Dimensional Molybdenum Disulfide Monolayer Emitters on a Three-Dimensional Substrate
作者: Chang, Chiao-Yun
Lin, Hsiang-Ting
Lai, Ming-Sheng
Yu, Cheng-Li
Wu, Chong-Rong
Chou, He-Chun
Lin, Shih-Yen
Chen, Chi
Shih, Min-Hsiung
光電工程學系
光電工程研究所
Department of Photonics
Institute of EO Enginerring
關鍵字: two-dimensional (2-D) material;transition metal dichalcogenides (TMDCs);molybdenum disulfide (MoS2);light Emitter;three-dimensional (3-D) substrate
公開日期: 24-Jul-2019
摘要: 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.
URI: http://dx.doi.org/10.1021/acsami.9b05082
http://hdl.handle.net/11536/152687
ISSN: 1944-8244
DOI: 10.1021/acsami.9b05082
期刊: ACS APPLIED MATERIALS & INTERFACES
Volume: 11
Issue: 29
起始頁: 26243
結束頁: 26249
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