Diffusing Mn(4+) into Dy(3+) Doped SrAl(2)O(4) for Full-Color Tunable Emissions

Dy(3+) and Mn(4+) codoped SrAl(2)O(4) (SrAl(2)O(4):Dy(3+),Mn(4+)) phosphors were obtained by diffusing Mn(4+) ions into Dy(3+)-doped SrAl(2)O(4) via the constant-source diffusion technique. The influences of diffusion temperature and diffusion time on the emissions of SrAl(2)O(4):Dy(3+),Mn(4+) were investigated. It was found that: (i) efficient red emission peaking at 651 nm can be readily achieved for SrAl(2)O(4):Dy(3+) by simply diffusing Mn(4+) into SrAl(2)O(4):Dy(3+) at 800 °C and above; (ii) the red emission of Mn(4+) becomes dominant over the characteristic emissions of Dy(3+) when the diffusion temperature is 900 °C or higher; and (iii) the intensity of the red emission of SrAl(2)O(4):Dy(3+),Mn(4+) is far more sensitive to diffusion temperature than to diffusion time. Our results have demonstrated that full-color tunable emissions can be realized for SrAl(2)O(4):Dy(3+), Mn(4+) by tuning the parameters of diffusion temperature and diffusion time, which opens up a space for realizing easy color control of Dy(3+)-doped inorganic materials.