Improvement the near-infrared luminescence properties of double perovskite phosphor La(Mg0.5Sn0.5In0.5Sc0.5)0.5O3:Cr3+via co-doping Yb3+

In recent years, the broadband near-infrared (NIR) spectroscopy technology has been widely used in the field of nondestructive testing. However, these existing NIR phosphors showed relatively short emission wavelengths, narrower half-maximum full-width (FWHM), and narrower half-peak widths, importantly, few phosphors pre-sented the emission from 950 nm to 1100 nm. In order to solve these problems, the Yb3+/Cr3+ ions codoped La (Mg0.5Sn0.5In0.5Sc0.5)0.5O3 (LMSIS) was synthesized by the solid-state method, and the emission spectrum of LMSIS:Cr3+ can be extended to the NIR long-wave region due to the energy transfer of Yb3+ and Cr3+, and the thermal stability of the phosphor can be improved due to the inherent temperature stability of the Yb3+ f-f transition. The NIR phosphor converted light emitting diodes (pc-LEDs) were fabricated by combining the LMSIS:0.003Cr3+, 0.0015Yb3+ with blue LED chip, which can be expected to be used in the field of broadband near-infrared non-destructive detection.