Abstract
Bright luminescence of Eu(II) doped into the cubic perovskites KMgH3 and mixed crystal compounds LiBaxSr(1-x)H(3) was observed and assigned to the 4f(6)5d-4f(7) emission of Eu2+. KMgH3: Eu2+ shows an extremely bright yellow emission, whereas the wavelength of the emission maximum in LiBaxSr(1-x)H(3): Eu2+ depends on the value of x and
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