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 |
Appears in Collections: | Articles |