p-Type Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films Prepared by Pulsed Laser Deposition and Their Application to Photodetectors
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概要
- 論文の詳細を見る
p-Type ultrananocrystalline diamond/hydrogenated amorphous carbon composite (UNCD/a-C:H) films were fabricated by pulsed laser deposition with boron-blended graphite targets. The X-ray diffraction patterns exhibited diffraction peaks attributable to diamond-111 and diamond-200. Electrical conductivity clearly increased with boron content. The near-edge X-ray absorption fine structure revealed that doped boron atoms partially replace hydrogen atoms that terminate the dangling bonds of UNCD grains. Heterojunction diodes comprising p-type UNCD/a-C:H and n-type Si showed a strong photoresponse that originates from UNCD grains in the wavelength range between 200 and 280 nm. We experimentally proved that boron-doped UNCD/a-C:H is a new promising p-type semiconductor for photodetection.
- 2012-09-25
著者
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Ohmagari Shinya
Department of Applied Science for Electronics and Materials, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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OHMAGARI Shinya
Department of Applied Science for Electronics and Materials, Kyushu University
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Yoshitake Tsuyoshi
Department of Applied Physics, Faculty of Engineering, Kyushu University
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