公开(公告)号：US20120132939A1

公开(公告)日：2012-05-31

申请号：US13363130

申请日：2012-01-31

申请人： Chung Hoon LEE ,  Walter TEWS ,  Gundula ROTH ,  Stefan TEWS

发明人： Chung Hoon LEE ,  Walter TEWS ,  Gundula ROTH ,  Stefan TEWS

IPC分类号： H01L27/15 ,  H01L33/50

CPC分类号： H01L33/502 ,  C09K11/7734 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/73265 ,  H01L2224/8592 ,  H01L2924/181 ,  H01L2924/19107 ,  H05B33/14 ,  H01L2924/00014 ,  H01L2924/00012

摘要： Disclosed is a light emitting device employing non-stoichiometric tetragonal Alkaline Earth Silicate phosphors. The light emitting device comprises a light emitting diode emitting light of ultraviolet or visible light, and non-stoichiometric luminescent material disposed around the light emitting diode. The luminescent material adsorbs at least a portion of the light emitted from the light emitting diode and emits light having a different wavelength from the absorbed light. The non-stoichiometric luminescent material has tetragonal crystal structure, and contains more silicon in the crystal lattice than that in the crystal lattice of silicate phosphors having stoichiometric crystal structure. The luminescent material is represented as the formula (BauSrvCawCux)3-y(Zn,Mg,Mn)zSi1+bO5+2b:Eua. Light emitting devices having improved temperature and humidity stability can be provided by employing the non-stoichiometric tetragonal Alkaline Earth Silicate phosphors.

摘要翻译： 公开了采用非化学计量的四方碱性硅酸盐磷光体的发光器件。 发光装置包括发射紫外线或可见光的发光二极管和设置在发光二极管周围的非化学计量的发光材料。 发光材料吸收从发光二极管发射的光的至少一部分，并发射与吸收光不同的波长的光。 非化学计量的发光材料具有四方晶体结构，并且在晶格中含有比在具有化学计量晶体结构的硅酸盐荧光体的晶格中更多的硅。 发光材料表示为式（BauSrvCawCux）3-y（Zn，Mg，Mn）zSi1 + bO5 + 2b：Eua。 具有改善的温度和湿度稳定性的发光器件可以通过使用非化学计量的四方碱性碱土硅酸盐荧光体来提供。