Enhancing efficiency and tuning the emission band via energy transfer of Cr 3+ , Ce 3+ co-doped CaLu 2 Mg 2 Si 3 O 12 phosphors

Efficient Ce 3+ → Cr 3+ energy transfer overcomes the intrinsically weak absorption of Cr 3+ and boosts NIR emission in the CaLu 2 Mg 2 Si 3 O 12 host.