|About this Abstract
||Materials Science & Technology 2012
||Advances in Dielectric Materials and Electronic Devices
||Czochralski Grown Ce,Gd:YAG Single Crystals: As Single Crystal Phosphor Plates for White Light-Emitting Diodes
||Kiyoshi Shimamura, M. Watanabe, D. Inomata, K. Aoki, A. Latynina, E.G. Víllora
|On-Site Speaker (Planned)
The combination of an InGaN-based blue LED and a Ce:YAG phosphor is the most popular method of white light generation. However, for the advanced high-power white LEDs, this combination cannot provide long-term stable work because of photodegradation of the organic epoxy resin. In this work we propose a new concept of white LED, based on the single crystal phosphor plates (SCPPs) of Czochralski grown Ce,Gd:YAG single crystal. New SCPP-based white LED realizes epoxy resin free package allowing to eliminate the photodegradation issue of the organic material. Substitution of the organic resin and powder mixture by the SCPP will insure the longer lifetime and higher light output of the white LED without the loss of its performance characteristics and quality. Therefore, Ce,Gd:YAG single crystals are important candidates for realization of resin-free high-power white LEDs. The detailed results of investigation will be discussed compared with the commercial packages.