Influence of Transition-Metal Cr Doping on Optical Properties of Rutile Single Crystal

The visible-light absorption of rutile was raised through doping Cr ion into the surface of rutile crystal with high-temperature-diffusion-doping-sensitization technique. TiO2: Cr specimen was analyzed by means of UV-VIS, XFA, XRD, XPS and LRS, respectively. As a result, it is shown that after Cr ion is doped into the surface of the crystal, Cr ion exists in the solid-melting-state Cr2TiO5, which induces the original absorption edge(410nm) move to 750nm, and achieves match with solar spectrum and raises optical absorption to visible-light effectively.