Office of Commercialization  Growth of Cerium Doped Yttrium Aluminum Garnet from an Alumina Rich Melt
Growth of Cerium Doped Yttrium Aluminum Garnet from an Alumina Rich Melt

Growth of Cerium Doped Yttrium Aluminum Garnet from an Alumina Rich Melt

Description:

Abstract

This WSU invention concerns the growth of Cerium Doped Yttrium Aluminum Garnet (Ce:YAG) from a melt containing aluminum oxide with known amounts of YAG. Ce:YAG is a phosphor, when in its pure single-crystal from, with a wide range of uses. Notably, crystals can be used in white light-emitting diodes, as a coating on a high-brightness blue Indium Gallium diode, converting part of the blue light into yellow, which then appears as white. We have observed a consistent increase in yellow light emission and therefore better energy resolutions when growing Ce:YAG from and alumina rich melt. The trend of better energy resolutions continues with higher alumina concentrations to produce Ce:YAG with record energy resolutions. As such, a system based off an alumina rich melt grown sample could provide good gamma and X-Ray spectroscopy at low cost.

Applications 

This technology is most applicable for use as light-emitting diodes. Pure crystals emits a spectrum of light when subjected to different conditions. Making this technology an effective and low cost option when manufacturing light-emitting diodes.

Advantages

Crystals can be used in mercury-vapor lamps and diodes.

Longer blub lifetime and a high intensity.

Clearer white light output. 

 

US Patent Application filed

Patent Information: