Improvement of luminescence properties in Zn2.1Mg0.9Ta2O8:Cr3+ 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 Zn- 2.1 Mg ( 0.9 - y ) Ga (y) Sn- y Ta O( 2 - y ) (8) :0.003Cr (3 +) NIR broadband phosphors with high quantum yields and high thermal stability are discovered by uniquely replacing [Mg2+-Ta5+] 2 + -Ta (5 +) ] in Zn Mg-2.1 ( 0.9) Ta- 2 O (8) with [Ga3+-Sn4+]. Under 460 nm excitation, Zn 2.1 Mg 0.85 Ga 0.05 Sn 0.05 Ta 1.95 O 8 : 0.003Cr3+ 3 + 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. (c) 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.