Deep ultraviolet emission in AlGaN-based quantum wells on bulk AlN substrates

Abstract

We studied the structural properties and optical properties of AlGaN-GaN multiple quantum wells (MQW) in a wide range of Al compositions form 45% to 100%. The characterisation by using X-ray, photoluminescence and atomic force microscopy techniques indicated high quality of the grown layers. The shortest emission wavelength measured in AlGaN-based MQWs is around 243 nm.