Properties of Czochralski grown Ce,Gd:Y3Al5O12 single crystal for white light-emitting diode

Czochralski grown Ce and Gd-doped Y3Al5O12 (Ce, Gd:YAG) single crystal demonstrated superior performance features in a new concept of white LED where it is used as thin single crystal phosphor plates (SCPPs). New SCPP-based white LED realizes epoxy resin free package, which allows to eliminate the photodegradation issue of the organic material. Optical, thermal and electrical properties of SCPPs and SCPP-based white LEDs are discussed with the powder phosphor and commercial LED reference. SCPPs showed significantly higher values and better stability under the high temperatures, irradiation and current. Quantum efficiency was found to be as high as 93%. (C) 2012 Elsevier B. V. All rights reserved.