Diamond ultraviolet light-emitting device
AssigneeTokyo Gas Co., Ltd.
InventorsTakefumi Ishikura, Kenji Horiuchi, Satoshi Yamashita, Aki Kawamura, Kazuo Nakamura, Kenichi Nakamura, Takahiro Ide
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Abstract
A small, simple current-injection diamond ultraviolet light-emitting device comprising a high-quality diamond grown by chemical vapor deposition (CVD) method (1), a surface conductive layer (2) provided on the surface of the diamond, and electrodes (4, 5) provided on the surface conductive layer. The device is a free-exciton recombination emission diamond ultraviolet light-emitting device comprising a CVD diamond crystal where the free-exciton recombination radiation (235 nm) caused by current injection is dominant.
Claims17
A diamond ultraviolet light-emitting device, comprising:
- a diamond crystal formed by a chemical vapor deposition (CVD) process;
- a first electrode formed on the diamond crystal;
- and
- a second electrode formed on the diamond crystal, wherein when current injection is performed between the first and second electrode, the diamond ultraviolet light-emitting device dominantly emits a light of a free exciton recombination radiation, having a peak wavelength of 235 nm, 242 nm, 249 nm, or 257 nm.
Dependencies are inferred from the claim text.