Field emission properties of nano-structured phosphorus-doped diamond |
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| Authors: | Takatoshi Yamada Christoph E. Nebel |
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| Affiliation: | a Diamond Research Center, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba 305-8568, Japan
b Fraunhofer Institute of Applied Solid State Physics, Tullastrasse 72, Freiburg 79108, Germany |
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| Abstract: | Nano-structured phosphorus-doped diamonds were fabricated for field emitters and their field emission properties were characterized. Two kinds of nano-structures were prepared; tip array structures and whiskers on tip structures. The tips, which have 100 nm radius and 10 μm height, are used in tip array structures; whiskers have tip radii of 5 nm and height of 500 nm. Following nano-structure formation, a reduction of threshold fields is observed compared to non-patterned flat surfaces. This is ascribed to field concentration at the tips. However, at higher electric fields, a saturation of the emission current is observed due to non-negligible bulk resistances in tips and whiskers. |
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| Keywords: | Diamond Field emission Nano-fabrication Electron affinity Field enhancement |
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