journal article·2021-11-26

Large-Area Monolayer MoS2 Nanosheets on GaN Substrates for Light-Emitting Diodes and Valley-Spin Electronic Devices

Peng Yang, Haifeng Yang, Zhengyuan Wu, Fuyou Liao, Xiaojiao Guo, Jianan Deng, Qiang Xu, Haomin Wang, Junjie Sun, Fei Chen, Wenzhong Bao, Laigui Hu, Zhongkai Liu, Yulin Chen, Zhi-Jun Qiu, Zhilai Fang, Ran Liu, Chunxiao Cong

ACS Applied Nano Materials· Volume 4· Issue 11
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Abstract

Van der Waals heterostructures composed of atomically thin two-dimensional (2D) materials and three-dimensional (3D) materials provide a multidimensional material integration strategy, which combines materials with different characteristics leading to a wider degree of freedom than a single component, and offer a way for developing electronic and optoelectronic devices with multifunctionalities, such as high-frequency electronic devices, photodetectors, valley-spin electronic devices, and so on. This report demonstrates the direct growth of large-area monolayer MoS2 single-crystal nanosheets with a side length of more than 100 μm on 3D GaN substrates by the perylene-3,4,9,10-tetracarboxylic acid tetrapotassium salt (PTAS) seed-assisted chemical vapor deposition (CVD) method. The seeding promoters changed the growth kinetics of MoS2 on the GaN substrate, which is different from the previously reported epitaxial growth behavior. The size of our synthesized single-crystal MoS2 nanosheets is 2 orders of magnitude larger than the reported epitaxially grown MoS2 on the GaN substrate. Meanwhile, the as-synthesized MoS2 by the seed-assisted CVD method has comparable crystal quality as that of the reported epitaxially grown MoS2 on the GaN substrate. Moreover, detailed characterizations indicate that noticeable charge transfer occurs between MoS2 and the GaN substrate, which suggests that the MoS2/GaN heterostructure has great potential applications in the field of light-emitting diodes (LED) and valley-spin electronic devices.
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Research context

OpenAlex topics: 2D Materials and Applications · Graphene research and applications · MXene and MAX Phase Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of ASIC and System, School of Information Science and Technology, Fudan University, Shanghai 200433, China

Yiwu Research Institute of Fudan University, Chengbei Road, Yiwu City, 322000 Zhejiang, China

School of Physical Science and Technology, ShanghaiTech University, 201210 Shanghai, China

School of Information Science and Technology, and Academy for Engineering and Technology, Fudan University, Shanghai 200433, China

State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Shanghai 200433, China

University of Michigan─Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Changning Road 865, Shanghai 200050, China

State Key Laboratory of Laser Interaction with Matter, Innovation Laboratory of Electro-Optical Countermeasures Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888 Dongnanhu Road, Changchun, Jilin 130033, China

Academy for Engineering and Technology, Fudan University, Shanghai 200433, China

Funding

Natural Science Foundation of Shanghai · National Natural Science Foundation of China · Fudan University-CIOMP Joint Fund · Shanghai Municipal Natural Science Foundation · "First-Class Construction" project of Fudan University · National Key R&D Program of China · Shanghai Municipal Science and Technology Commission · State Key Laboratory of ASIC & System, Fudan University · National Young 1000 Talent Plan of China · Shanghai Sailing Program

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