Light-emitting diode and preparation method thereof

The invention discloses a light-emitting diode (LED) at least comprising a support, an LED chip and a luminous layer on the LED chip. The LED is characterized in that the material of the luminous layer is the mixed system of one or more than one fluorescent powder capable of emitting different colors of light and organic silica adhesives required to be solidified by ultraviolet light; the silica adhesives comprise the following raw materials: photosensitive polysiloxane, photoinitiator and active diluents. The luminous layer solves the problems of the gel solidification and the fluorescent powder sedimentation in the fluorescent powder coating process, improves the uniformity of the fluorescent powders on the chip, enhances the adhesion degree of the luminous layer and the chip and simultaneously shortens the solidification time of the luminous layer.