Georgia Institute of Technology UMI2958 | Georgia Institute of Technology | Atlanta, GA

A recently awarded research grant from the European Union’s Clean Sky 2 program is allowing the Daniel Guggenheim School of Aerospace Engineering’s Aerospace Systems Design Laboratory (ASDL) to join a large-scale initiative to address critical aviation growth issues over the next few decades. 

This new technique uses a combination of van der Waals epitaxy of h-BN and selective area growth techniques that results in individual GaN-based devices such as LEDs, HEMT transistors, or solar cells that can be easily removed from the sapphire substrate and placed on other supports. Given that GaN and Sapphire are some of the hardest and strongest materials around, this is quite the trick!

The UMI researchers have grown self-organized GaN nanorod LED devices that were mechanically transfered to another substrate.  Hexagonal h-BN provided a key role in decoupling substrate from nanodevice and permitting lift-off.  This new technology is demonstrated at the wafer scale and can result in commericalization of nano-LEDs and other nanoscale nitride optoelectronic devices.