Near-Infrared Broadband ZnTa2O6:Cr3+ Phosphor for pc-LEDs and Its Application to Nondestructive Testing.Broadband near-infrared (NIR) phosphors are necessary materials for developing portable NIR light sources. 
pc-LEDs
Near-Infrared Broadband ZnTa2O6:Cr3+ Phosphor for pc-LEDs and Its Application to Nondestructive Testing.Broadband near-infrared (NIR) phosphors are necessary materials for developing portable NIR light sources. 
pc-LEDs