Abstract
A simple, one-step, and fast method based on exothermic reactions is described for synthesis of Tb3Al5O12:Ce phosphor. Light-emitting diodes (LEDs) were fabricated by depositing this phosphor on a blue chip. Photoluminescence and LED emission are compared with respective results for well-known YAG:Ce phosphor. A significant improvement in color rendering index (CRI) attributed to the red shift of Ce3+ emission was observed. Persistent emission is also reported for the first time in the Tb3Al5O12:Ce annealed in reducing atmosphere. It well correlates with Ce3+ emission and a peak around 80°C in the thermoluminescence glow. The long-lasting emission was associated with host-related electron traps.
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