Photons taken out of the ultraviolet light-emitting device

【Task】 UV radiation, An effectively increase the photon extraction efficiency by UV LED in particular to overcome the lack of clear stable sealant against UVC rays A layer of an organic sealant is provided on the surface of the ultraviolet (UV) rays emitting semiconductor die, at least part of the sealant is exposed to UV light, at least partially non-stoichiometry of the portion of sealant into a logical manner silica material. Non-stoichiometric silica material comprises silicon, oxygen and carbon, the carbon content of the non-stoichiometric silica material is greater than 1 ppm, and is smaller than 40 atomic percent. .FIELD 1A