In a light-emitting device, a light-emitting layer portion composed of a compound
semiconductor is bonded on one main surface of a transparent conductive semiconductor
substrate while placing a substrate-bonding conductive oxide layer composed of
a conductive oxide in between. Between the light-emitting layer portion and the
substrate-bonding conductive oxide layer, a contact layer for reducing junction
resistance with the substrate-bonding conductive oxide layer so as to contact with
the substrate-bonding conductive oxide layer. This is successful in providing the
light-emitting device which is producible at low costs, has a low series resistance,
and can attain a sufficient emission efficiency despite it has a thick current-spreading layer.