31 August 2012

HexaTech launches high-transparency single-crystal AlN substrates for UV-C LEDs

HexaTech Inc of Morrisville, NC, USA has announced the commercial availability of a new class of high-transparency single-crystal aluminium nitride (AlN) material. The firm reckons that this improved capability provides a significant reduction in optical absorption at UV-C wavelengths, resulting in improvements in the processing and performance of UV-C optoelectronic components.

The enhanced material promises improvements in lifetime and power output for UV-C LEDs. For the rapidly growing water purification market, the requirement for extended lifetime and improved efficiency are critical market-enabling parameters, says HexaTech. The firm adds that the new high-transparency bulk AlN substrate material has demonstrated improved output performance for UV-C LEDs, by increasing short-wavelength transparency, and limiting the amount of substrate thinning required for optimal UV-C emission.

“This new substrate will provide our customers with the bulk AlN material required to develop industry- leading UV-C LEDs which will enable improved EQE [external quantum efficiency], lifetime and reliability,” says CEO Joe Grzyb.

The improved material performance, after correction for reflection losses, exhibits absorption coefficient values of < 100cm-1 (50cm-1 typical) @ 265nm, and is measurably superior to previous generations of single-crystal AlN. It is reckoned.

Tags: HexaTech AlN substrates UV-C LEDs

Visit: www.hexatechinc.com