摘要:
This invention is related to ABOS:M-based phosphors, e.g. phosphors that are based on modified CaZnOS. Furthermore, this invention is related to the use of these phosphors for converting radiation. This invention is also related to light sources that contain the inventive phosphor. An inventive phosphor shows the general formula ABOS:M, where A is at least one element selected from the group consisting of Ca, Mg, Sr, and Ba; B is at least one element selected from the group consisting of Zn and Mg; and M is at least one element selected from the group consisting of Mn 2+ , Cu 2+ , and Eu 2+ . Optionally, M can additionally contain one ore more elements selected from the group consisting of Mn 2+ , Cu 2+ , Cu + , Ag + , Pb 2+ , Sb 3+ , Sn 2+ , Bi 3- , Eu 2+ , Ce 3+ , Tb 3+ , and Pr 3+ as well as Li + , Na + , K + , and Rb + .
摘要:
The invention relates to a method of manufacturing a rare-earth doped alkaline-earth silicon nitride phosphor of a stoichiometric composition. Said method comprising the step of selecting one or more compounds each comprising at least one element of the group comprising the rare-earth elements (RE), the alkaline-earth elements (AE), silicon (Si) and nitrogen (N) and together comprising the necessary elements to form the rare-earth doped alkaline-earth silicon nitride phosphor (AE2Si5N8:RE). The method further comprises the step of bringing the compounds at an elevated temperature in reaction for forming the rare-earth doped alkaline-earth silicon nitride phosphor (AE2Si5N8:RE). In such a method normally a small amount of oxygen, whether intentionally or not-intentionally added, will be incorporated in the rare-earth doped alkaline-earth silicon nitride phosphor (AE2Si5N8:RE). According to the invention the creation of defects by formation of a non-stoichiometric oxygen containing phosphor is at least partly prevented by partly substituting for the ions (AE, Si, N) of the alkaline-earth silicon nitride phosphor (AE2Si5N8:RE) suitable further elements of the periodic system by which vacancies are created, filled or annihilated resulting in the formation of a modified alkaline-earth silicon nitride phosphor (AE2Si5N8:RE) having a stoichiometric composition. In this way a modified phosphor is obtained having excellent and stable optical properties. The invention further relates to a modified phosphor obtainable by the above-mentioned method and a radiation converting device comprising such a phosphor.
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)SrO x(Ba, Ca)O (1-a-b-c-d)SiO2 aP2O5 bAl2O3 cB2O3 dGeO2: y Eu2+ and/or (2-x-y)BaO x((Sr, Ca)O (1-a-b-c-d)SiO¿2? aP2O5 bAl2O3 cB2O3 dGeO2: y Eu?2+¿. 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¿4?:Eu or can contain alkaline-earth magnesium disilicate.
摘要翻译:本发明涉及包含发光元件的光源,所述发光元件发射第一光谱区域中的光,并且包含发光体,所述发光体来自所述碱土原硅酸盐的组并且吸收由所述光发射的一部分光 来源并在另一个光谱区域发射光线。 根据本发明,发光材料是碱土原硅酸盐,其用二价铕活化并且其组成包括:(2-xy)SrO x(Ba,Ca)O(1-abcd)SiO 2 aP 2 O 5 bAl 2 O 3 cB 2 O 3 dGeO 2: y Eu2 +和/或(2-xy)BaO x((Sr,Ca)O(1-abcd)SiO 2·aP 2 O 5 bAl 2 O 3 cB 2 O 3 dGeO 2:y Eu 2+ + 通过使用上述类型的发光体进行调节,光源可以含有选自碱土铝酸盐,用二价铕和/或锰活化的另外的发光体,和/或可以含有选自以下的另外的红色发光发光体: 基团Y(V,P,Si)O4:Eu或可以含有碱土金属硅酸盐。
摘要:
The invention relates to a light emitting device (1) having a radiation emitting element, for example a light emitting diode (LED), and a luminescent material (3) which is able to absorb a part of the radiation sent out by the radiation emitting element and to send out light with a wavelength which is different from the wavelength of the absorbed radiation. The device further has diffusing particles (4) which are able to scatter a part of the radiation sent out by the radiation emitting element, and/or to scatter a part of the light sent out by the luminescent material (3). The diffusing particles (4) are of non-activated luminescent material, through which production is simplified.