Characterization of GAGG Doped with Extremely Low Levels of Chromium and Exhibiting Exceptional Intensity of Emission in NIR Region

Cerium and chromium co-doped gadolinium aluminum gallium garnets were prepared using sol-gel technique. These compounds potentially can be applied for NIR-LED construction, horticulture theranostics. Additionally, magnesium calcium ions also incorporated into the structure. X-ray diffraction data analysis confirmed all-cubic symmetry with an Ia-3d space group, which is appropriate garnet-type materials. From characterization of luminescence properties, it was that both cerium emissions could incorporated. detected under 450 nm excitation, while emission, 270 excitation used. The emission exceptionally intense, although determined these are doped only by parts per million Cr3+ ions. Typically, maxima located around 650–750 in garnet systems. However, this case, maximum measured to 790 nm, caused re-absorption main observation study switchable wavelength a compound single phase obtained, despite fact doping Cr performed ppm level, causing intense NIR region.