COMPOSITE FLUORESCENT MATERIAL FOR SOLID-STATE ACHROMATIC LIGHT SOURCES Russian patent published in 2014 - IPC H01L33/26 C09K11/77 

FIELD: electricity.

SUBSTANCE: invention relates to light engineering and in particular to composite fluorescent materials used for solid-state achromatic light sources. According to the invention composite fluorescent material is suggested for solid-state achromatic light sources, which contain light-emitting diode that emits within range of 430-480 nm and a mixture of at least two luminophores; the first luminophore has cadmium-orange light emission within the range of 560-630 nm while the second one is taken from aluminate group of earth metals activated with europium. At that at least one light-accumulating luminophore having long-term afterglow, which practically unexcited by primary emission of the light-emitting diode is used as the second luminophore. Mass ratio of cadmium-orange luminophore and light-accumulating luminophore is the following: cadmium-orange luminophore is 10-90%, light-accumulating luminophore is 10-90%.

EFFECT: obtained material is characterised by high brightness and light parameters corresponding to radiation curve of absolutely black body with colour temperature from 2900 up to 6100 K, long-term afterglow and low costs.

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