LIGHT-RADIATING DEVICE, USING NON-STOICHIOMETRIC TETRAGONAL RARE-EARTH SILICATE LUMINOPHORS

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FIELD : electricity. SUBSTANCE : invention relates to light-radiating devices using non-stoichiometric tetragonal rare-earth silicate luminophors. The proposed light-radiating device comprises a light-emitting diode, which emits light in an ultraviolet or visible part of spectrum, and a non-stoichiometric luminescent material arranged around the light-emitting diode. The luminescent material absorbs at least some light emitted by the light-emitting diode, and radiates light with a wavelength differing from the absorbed light. The non-stoichiometric luminescent material has a tetragonal crystalline structure and comprises more silicon in a crystalline grid compared to its content in the crystalline grid of silicate luminophors, having a stoichiometric crystalline structure. EFFECT : due to usage of non-stoichiometric tetragonal rare-earth silicate luminophors, light-radiating devices may be produced, which have higher resistance to impact of temperature and moisture. 19 cl, 12 dwg, 3 tbl, 3 ex