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The present invention provide blue-green silicate luminescent materials, which are rare earth activated alkaline-earth metals silicates having a formula of Ba 1-b M b Si 2 O (5-a/2) D a : Eu x , Ln y , 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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