Synthesis of Cα-α-SiAlON phosphor by one-step LPP-CRN method

Cα-α-SiAlON : Eu²⁺ phosphors used for white LEDs were synthesized by one-step LPP-CRN method. Crystalline cellulose was used as a carbon source for synthesizing Cα-α-SiAlON : Eu²⁺ phosphors. This phosphor emits yellow to orange light. This phosphor showed a single broad band emission attributed to the 5d → 4f transition of Eu²⁺ ions. The synthesized yellow- to orange-emitting phosphors obtained without using excess carbon were crystallized much effectively and showed higher emission intensity. This phosphor obtained using the LPP-CRN method is expected to lead to the synthesis of other oxynitride phosphors and to be applied to white LEDs.