Abstract
In this work, a phosphor for white light-emitting diode (LED) application, Ce3+-doped yttrium aluminum garnet (YAG:Ce3+), was successfully packaged using a P2O5-ZnO-Na2O-Al2O3 glass-ceramic system, through a vertical deposition method. Here, we found that white light can be achieved by combining the packaged phosphor with a blue chip (e.g. InGaN). The specimen doped with 4mol% Al2O3 showed a luminous efficacy (LE) of 125.8lmW−1, at a correlated color temperature (CCT) of 5769K, with a color rendering index (CRI) of 68. In addition, the LE loss of the specimen doped with 4mol% Al2O3 was only 3.6% after heat treatment at 150°C for 1200h, which is significantly lower than that of traditional resin (19.3%). Moreover, a possible mechanism for reducing the LE loss using glass-ceramics was proposed.
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