Patent ID: 7816663
Filing Date: 2010-10-19
Classification: C09K,H01L,Y02B

Abstract:
1. A yellow-orange silicate phosphor used in a warm-white semiconductor, comprising a silicon oxide substrate having a garnet crystal architecture and excited by d-element, wherein said silicon oxide substrate has the stoichiometric equation Mg 2.0 Me +2 0.5 Ln 3 Si 2.5 O 12-2y N y F y :Ak x +n in which Ln=Sc and/or Lu and/or Yb and/or Er and/or Ho; Me +2 =Ca and/or Sr and/or Ba; the phosphor is excited d,f-element ions that came from Ak +n =Cu +1 , Ce +3 , Eu +2 , Ag +1 , Mn +2 , and formed of one single element or a pair of elements, i.e., Cu +1 +Ce 3 , Cu +1 +Mn +2 or Ag +1 +Ce +3 ; the phosphor produces a yellow-orange luminance radiation at a specific wavelength when excited by the shortwave light of a nitride semiconductor heterostructure, and at the same time these two radiations are mixed to produce warm white light.