▎ 摘　　要

NOVELTY - The device has a light-emitting component (2) including a circuit board (21). An LED (22) is mounted on and electrically connected to the circuit board. A wavelength-converting shell (23) covers the LED. A heat conductive layer (24) is formed on the shell and made of graphene and silver material. The shell comprises inner surfaces (31, 231) facing toward the LED and outer surfaces (32, 232) opposite to the inner surface. The heat conductive layer is formed on one of the inner surfaces and the outer surfaces of the shell. The heat conductive layer extends to the circuit board. USE - Light-emitting device for transforming electrical energy into light energy. ADVANTAGE - The device has low power consumption, less volume, high transforming efficiency and prolonged service life, and utilizes a heat conductive substrate to conduct and dissipate heat produced from the light-emitting device to alleviate or eliminate the heat produced in the light-emitting device. The device utilizes the graphene, the heat conductive nanowire and the carbon nanotube, so that the device is light in weight, and has high heat conductivity and uniform heat conductivity. DETAILED DESCRIPTION - The heat conductive layer comprises a heat conductive nanowire that is made of material selected from a group consisting of gold, silver, copper, aluminum, platinum, aluminum nitride, titanium nitride and titanium carbide. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic sectional view of a light-emitting device. Light-emitting component (2) Circuit board (21) LED (22) Shell (23) Heat conductive layer (24) Inner surfaces of the shell (31, 231) Outer surfaces of the shell (32, 232)