Near-infrared spectroscopy detection technology has the characteristics of non-invasive,portable,fast response,high efficiency,etc.,and it has broad application prospects in the fields of food analysis,medical monitoring,iris recognition and infrared imaging.However,the development of near-infrared device is greatly restricted due to the narrow emission band and poor thermal stability of near-infrared phosphors materials.For this reason,blue light excitation Cr3+doped near infrared luminescent materials have significant advantages in many schemes.In this paper,the research results of Cr3+doped wideband near-infrared phosphor materials in recent years are summarized,and the quantum efficiency,emission band,electroacoustic coupling effect and the packaging of NIR pc-LED devices of Cr3+doped near-infrared phosphors materials are analyzed.The regulation strategies of Cr3+ion site occupancy,sensitization and luminescence,emission band and thermal stability are described.Finally,the application prospects of high-efficiency broad-spectrum emission near-infrared luminescent materials are prospected.
万方数据