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 presented the emission from 950 nm to 1100 nm. In order to solve these problems, the Yb 3+ /Cr 3+ ions codoped La(Mg 0.5 Sn 0.5 In 0.5 Sc 0.5 ) 0.5 O 3 (LMSIS) was synthesized by the solid-state method, and the emission spectrum of LMSIS:Cr 3+ can be extended to the NIR long-wave region due to the energy transfer of Yb 3+ and Cr 3+ , and the thermal stability of the phosphor can be improved due to the inherent temperature stability of the Yb 3+ f-f transition. The NIR phosphor converted light emitting diodes (pc-LEDs) were fabricated by combining the LMSIS:0.003Cr 3+ , 0.0015Yb 3+ with blue LED chip, which can be expected to be used in the field of broadband near-infrared non-destructive detection.