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The present invention provides blue-green silicate luminescent materials, which are rare earth activated alkaline-earth metals silicates having a formula of Ba1-bMbSi2O(5-a/2)Da : Eux, Lny, wherein M is one or two elements selected from the group consisting of Mg, Ca and Sr; D is one or two ions selected from the group consisting of Cl− and F−; Ln is an ion selected from Ce, Er, Pr or Mn; a, b, x, and y are molar coefficients and within following ranges : 0≦a<2, 0≦b<0.5, 0
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