| 摘要 |
<p>A light emitting device includes a transparent substrate (1) having first and second surfaces, a semiconductor layer (2-6) provided on the first surface, a first light emission layer (11) provided over the semiconductor layer (2-6) and emitting first ultraviolet light including a wavelength corresponding to an energy larger than a forbidden bandwidth of a semiconductor of the semiconductor layer, a second light emission layer (8) provided between the first light emission layer (11) and the semiconductor layer (2-6), absorbing the first ultraviolet light emitted from the first light emission layer (11), and emitting second ultraviolet light including a wavelength corresponding to an energy smaller than the forbidden bandwidth of the semiconductor of the semiconductor layer (2-6), and first (18) and second (19) electrodes provided to apply electric power to the first light emission layer (11).</p> |
