| 摘要 |
A phosphor for blue-light LEDs formed by different solid solutions of (SigmaLn)<SUB>3</SUB>Al<SUB>5</SUB>O<SUB>12 </SUB>and Me<SUP>II</SUP><SUB>3</SUB>Me<SUP>III</SUP><SUB>2</SUB>Si<SUB>3</SUB>O<SUB>12 </SUB>with a ratio of (1-x):x having a stoichiometry of (SigmaLn)<SUB>3-x</SUB>Me<SUP>II</SUP><SUB>3x</SUB>Me<SUP>III</SUP><SUB>2x</SUB>Al<SUB>5-x</SUB>Si<SUB>3x</SUB>O<SUB>12</SUB>, in which Ln=Y and/or Gd and/or Lu and/or Ce and/or Yb and/or Pr and/or Sm, Me<SUP>II</SUP>=Mg and/or Ca and/or Sr and/or Ba Me<SUP>III</SUP>=In and/or Ga and/or Sc, in which 0.0001<=x<=0.2. The specific composition of the phosphor has a color coordinate of x>=0.42 and the total coordination number of Sigma(x+y)>=0.92. The radiation of the phosphor is in the range of lambda=500~750 nm and the position of the maximum spectrum changes from lambda=520~585 nm. The light-emitting diodes made from this phosphor can emit very bright, warm white light with light intensity reaching 400~600 cd, total flux F>420 lm, and light efficiency over 100 lm/W.
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