Improvement of luminescence properties in ZnMgTaO:Cr by the cation substitution and its application in biological nondestructive testing and night vision lighting.

Recently, it is of great significance to explore near-infrared (NIR) phosphor with more application prospects. In this work, a series of ZnMgGaSnTaO:0.003Cr NIR broadband phosphors with high quantum yields and high thermal stability are discovered by uniquely replacing [Mg-Ta] in ZnMgTaO with [Ga-Sn]. Under 460 nm excitation, ZnMgGaSnTaO: 0.003Cr depicts the 600-1100 nm broadband emission with a full-width at half maximum (FWHM) of 210 nm, and the quantum yields can reach 61.2%. Finally, the phosphor was mixed with epoxy resin and encapsulated in a 460 nm blue light emitting diode (LED) chip to convert the NIR LED by phosphor (NIR pc-LED), which was applied in the field of biological nondestructive testing and night vision lighting.