Current injection-type diamond ultraviolet light-emitting device
AssigneeTokyo Gas Co., Ltd.
InventorsKenji Horiuchi, Kazuo Nakamura, Satoshi Yamashita
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Abstract
A current injection-type diamond ultraviolet light-emitting device is provided that achieves the diamond free exciton recombination radiation by forming electrodes on a high-quality diamond crystal and applying a DC voltage between electrodes to inject carriers. A diamond crystal can be selected in terms of photoluminescent spectrum at room temperature and the half width of the Raman scattering peak intrinsic to the diamond.
Claims65
An ultraviolet light-emitting device comprising:
- (a) an electrode;
- and
- (b) a diamond crystal having impurities and being coupled with the electrode, the diamond crystal being configured such that when electric current is injected into the diamond crystal from the electrode, the diamond crystal emits free excitation recombination radiation in the ultraviolet region of wavelengths at a first intensity and the impurities within the diamond crystal emit a radiation in the ultraviolet region of wavelengths at a second intensity, the first intensity being at least twice as large as the second intensity.
A current injection-type diamond ultraviolet light-emitting device which emits light due to excitation by the injection of current, characterized in that the above-mentioned diamond ultraviolet light-emitting device has a luminescent layer comprising a diamond in which occurs an emission such that the free excitation recombination radiation due to excitation by the injection of current is dominant.
Dependencies are inferred from the claim text.