Broadband and High Efficiency Near‐Infrared Emission in Cr 3+ ‐Doped ZnWO 4 Phosphors for Spectroscopic Applications

phosphor into a silicone matrix and coupling it with a 450-nm blue LED chip. The device delivered an output power of 17.12 mW at a 140-mA driving current and a photoelectric conversion efficiency of 14.42% at 20 mA. These results demonstrate the promising potential of this NIR pc-LED for practical applications such as night vision and vein imaging.