Growth and characterization of air annealing Mn-doped YAG:Ce single crystal for LED

The growth of Mn-doped YAG:Ce (yttrium aluminum garnet doped cerium) single crystal by the Czochralski (CZ) method and the characterization of its spectroscopy and color-electric parameters are presented. The absorption spectra indicate that the crystal absorbed highly in the 300–500 nm wavelength range. The emission spectrum of the crystal consists of a peak around 538 nm when excited by 460 nm blue light, which prove the YAG:Ce,Mn single crystal could be used in the white light emitting doides (LED). The different charges of Mn ions have different luminescence properties, and the air annealing process for the single crystal would change the concentration of Mn ions with different charges, which could influence the emission intensity of the single crystal.

► The YAG:Ce,Mn single crystal was well synthesized by the Czochralski (CZ) method.
► The emission intensity of the sample has been influenced after annealing.
► Annealed in the air at 1200 °C was the most optimal annealing condition.
► The single crystal could be used in the white light LED which emitted by blue light.