Efficient field emission from well-oriented Cu2O film |
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Authors: | Qun Tang Xihong Chen Yitai Qian |
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Institution: | a Department of Chemistry, Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China b School of Physics, Peking University, Beijing 100871, People's Republic of China |
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Abstract: | Well-oriented Cu2O films comprising of octahedral-shaped crystals were grown directly on copper foil via an hydrothermal treatment. The well-oriented films were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Field emission from the film showed good emission properties, and, the electron emission turn-on field (Eto) and threshold field (Ethr) are about 9.6 and 13.4 V/μm respectively, which is similar to the values reported for CuO nanofiber, although the latter has a much larger size. The corresponding Fowler-Nordheim (F-N) plots showed a linear behavior. The sharp corners of the tips are considered as main electron emitters and account for its good performance. |
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Keywords: | 73 50 &minus h 79 70 +q |
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