Eu(ii) luminescence in the perovskite host lattices KMgH3, NaMgH3 and mixed crystals LiBaxSr1-xH 3

Abstract

Bright luminescence of Eu(ii) doped into the cubic perovskites KMgH 3 and mixed crystal compounds LiBaxSr1-xH 3 was observed and assigned to the 4f65d-4f7 emission of Eu2+. KMgH3:Eu2+ shows an extremely bright yellow emission, whereas the wavelength of the emission maximum in LiBaxSr1-xH3:Eu2+ depends on the value of x and ranges from yellow to green. Furthermore, an extremely wide red shift in the emission energy is observed for the orthorhombically distorted perovskite NaMgH3:Eu2+. Additionally, we review the crystal structure of KMgH3 using density functional calculations. This journal is © the Partner Organisations 2014.