| abstract |
Embodiments of the invention include an infrared-emitting phosphor comprising (La,Gd) 3 Ga 5−x−y Al x SiO 14 :Cr y , where 0≤x≤1 and 0.02≤y≤0.08. In some embodiments, the infrared-emitting phosphor is a calcium gallogermanate material. In some embodiments, the infrared-emitting phosphor is used with a second infrared-emitting phosphor. The second infrared-emitting phosphor is one or more chromium doped garnets of composition Gd 3−x1 Sc 2−x2−y Lu x1+x2 Ga 3 O 12 :Cr y , where 0.02≤x1≤0.25, 0.05≤x2≤0.3 and 0.04≤y≤0.12. |