Fig 12 - uploaded by Ajithkumar Gangadharan
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CIE color coordinate plot showing the x, y coordinates of the emission in M 2 O 2 S: Yb (8) Er (1) (M = Y, Gd and La). The emission color was marked by the white arrow.  

CIE color coordinate plot showing the x, y coordinates of the emission in M 2 O 2 S: Yb (8) Er (1) (M = Y, Gd and La). The emission color was marked by the white arrow.