Patent ID: 8071991

Claim:
A light-emitting diode comprising: a first conductive type silicon single crystal substrate; a light-emitting section, including a first pn junction structure composed of a III-group nitride semiconductor, provided on a front surface of the silicon single crystal substrate; a thin-film conductive type semiconductor layer provided between the first conductive type silicon single crystal substrate and the III-group nitride semiconductor such that the thin-film conductive type semiconductor layer abuts the front surface of the silicon single crystal substrate and abuts a back surface of the III-group nitride semiconductor; a first polarity ohmic electrode formed on a contact layer made of a first conductive type semiconductor which is provided on the light-emitting section; and a second polarity ohmic electrode formed on the III-group nitride semiconductor made of a second conductive type semiconductor, the second polarity ohmic electrode formed in contact with a front surface of the III-group nitride semiconductor, wherein a second pn junction structure is formed in a region which extends from the first conductive type silicon single crystal substrate to the light-emitting section, a light-reflecting hole is provided in the silicon single crystal substrate from a back surface of the silicon single crystal substrate opposite to the front surface on which the light-emitting section of the silicon single crystal substrate is provided toward a stacking direction, and an inner surface of the light-reflecting hole and the back surface of the silicon single crystal substrate are coated with a metallic film.