Broadband near-infrared luminescence theory and application. Credit: Gui-Hua Li, et al Near-infrared (NIR) light source, characterized by non-destructive and rapid detection, has a wide range of applications in diverse fields including food testing, safety, sensing, agricultural production and biomedicine. The availability of a compact, highly efficient and low-cost NIR phosphor is a key factor in achieving its wide application. NIR pc-LED, boasting qualities such as lower cost and adjustable em...