| 摘要 |
The invention relates to a light source comprising a light-emitting element, which emits light in a first spectral region, and comprising a luminophore, which comes from the group of alkaline-earth orthosilicates and which absorbs a portion of the light emitted by the light source and emits light in another spectral region. According to the invention, the luminophore is an alkaline-earth orthosilicate, which is activated with bivalent europium and whose composition consists of: (2-x-y)SrOx(Ba, Ca)O (1-a-b-c-d)SiO<SUB>2</SUB>aP<SUB>2</SUB>O<SUB>5</SUB>bAl<SUB>2</SUB>O<SUB>3</SUB>cB<SUB>2</SUB>O<SUB>3</SUB>dGeO<SUB>2</SUB>: y Eu<SUP>2+ </SUP>and/or (2-x-y)BaOx((Sr, Ca)O (1-a-b-c-d)SiO<SUB>2</SUB>aP<SUB>2</SUB>O<SUB>5</SUB>bAl<SUB>2</SUB>O<SUB>3</SUB>cB<SUB>2</SUB>O<SUB>3</SUB>dGeO<SUB>2</SUB>: y Eu<SUP>2+</SUP>. The desired color (color temperature) can be easily adjusted by using a luminophore of the aforementioned type. The light source can contain an additional luminophore selected from the group of alkaline-earth aluminates, activated with bivalent europium and/or manganese, and/or can contain an additional red-emitting luminophore selected from the group Y(V, P, Si)O<SUB>4</SUB>:Eu or can contain alkaline-earth magnesium disilicate.
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