发明申请
- 专利标题： LIGHT EMITTING DEVICE EMPLOYING NON-STOICHIOMETRIC TETRAGONAL ALKALINE EARTH SILICATE PHOSPHORS
- 专利标题（中）： 使用非超低浓度碱性碱性碱土金属硅酸盐的发光装置
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申请号： US13363130申请日： 2012-01-31
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公开(公告)号： US20120132939A1公开(公告)日： 2012-05-31
- 发明人: Chung Hoon LEE , Walter TEWS , Gundula ROTH , Stefan TEWS
- 申请人： Chung Hoon LEE , Walter TEWS , Gundula ROTH , Stefan TEWS
- 申请人地址： KR Ansan-si
- 专利权人： SEOUL SEMICONDUCTOR CO., LTD.
- 当前专利权人： SEOUL SEMICONDUCTOR CO., LTD.
- 当前专利权人地址： KR Ansan-si
- 优先权： KR10-2007-0086483 20070828; KR10-2008-0075181 20080731
- 主分类号： H01L27/15
- IPC分类号： H01L27/15 ; H01L33/50
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.