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Stable electron field emission from carbon nanotubes emitter transferred on graphene films
Institution:1. Display Research Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People''s Republic of China;2. College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210096, People''s Republic of China;1. State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, People''s Republic of China;2. Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, People''s Republic of China;3. Jinan Institute of Quantum Technology, SAICT, Jinan 250101, People''s Republic of China;1. Department of Physics, University of Kalyani, Kalyani 741235, West Bengal, India;1. Department of Engineering Mechanics, Northwestern Polytechnical University, Xi''an 710072, PR China;2. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi''an 710064, PR China;1. Department of Physics, “Politehnica” University of Bucharest, 313 Splaiul Independenţei, Bucharest RO-060042, Romania;2. Grupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
Abstract:Carbon nanotubes (CNTs) arrays grown by microwave plasma enhanced chemical vapor deposition (MPCVD) method was transferred onto the substrate covered with graphene layer obtained by thermal chemical vapor deposition (CVD) technology. The graphene buffer layer provides good electrical and thermal contact to the CNTs. The field emission characteristics of this hybrid structure were investigated in this study. Compared with the CNTs arrays directly grown on the silicon substrate, the hybrid emitter shows better field emission performance, such as high emission current and long-term emission stability. The presence of this graphene layer was shown to improve the field emission behavior of CNTs. This work provides an effective way to realize stable field emission from CNTs emitter and similar hybrid structures.
Keywords:Field emission  Carbon nanotubes  Graphene CVD growth  Transfer method  Contact resistance  Joule heating
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