FLUORESCENT MATERIAL FOR WHITE LIGHT EMITTING DIODE AND PREPARATION METHOD THEREOF

摘要

The phosphor containing a garnet structure of the following formula (1) exhibits excellent green luminescence with high brightness under excitation of blue light by adding cerium as an activator and tulium as a negative active agent to the aluminate-based phosphor, It is useful as a material. [Chemical Formula 1] (Lu _x Tm _y Ce _z ) ₃ Al ₅ O ₁₂ 0.5? X? 0.99, y 0, z 0, and x + y + z = 1.