A semiconductor luminescent device improving heat radiation and a three-dimensional LED light source

The utility model discloses a semiconductor luminescent device improving heat radiation and a three-dimensional LED light source, and is used for improving heat radiation statuses of a luminescence semiconductor. Heat emitted by chips can be more rapidly conducted out so as to reduce heat accumulation on chips and around the chips. The semiconductor luminescent device comprises at least two LED chips. Two electrodes of each LED chip are in a same plane; a conductive carbon nanotube layer is arranged on the surface, where the electrodes are, of the LED chips; the conductive carbon nanotube layer is used as a conductive wire for electric connection between the two LED chips; a phosphor layer is arranged on the back surface, which are without electrodes, of the LED chips. According to the structure, the resistance and the thermal resistance are both very small; conductive carbon nanotubes are used as series-parallel connection conductive wires between the chips and enable heat inside the chips to be highly efficiently conducted out; heat accumulated on the surface of the chips can be scattered into the surrounding environment very rapidly through the conductive carbon nanotubes.