Diffusing Mn into Dy Doped SrAlO for Full-Color Tunable Emissions.

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