Mg4Nb2O9:Cr3+: broadband near-infrared luminescence

Abstract The exploration of broadband Near infrared (NIR) phosphors is one of the research priorities to enable the advancement of NIR devices. In this work, Mg 4 Nb 2 O 9 :Cr 3+ phosphors were prepared by high-temperature solid-state reaction method. Mg 4 Nb 2 O 9 :Cr 3+ can emit ultra-broadband NIR centred at 880 nm with an extremely full width at half maximum (FWHM) of near 200 nm, and NIR phosphor-converted LED (pc-LED) has been fabricated by combining a 450 nm blue LED with MNO:0.5%Cr to demonstrate its application prospect in night vision.