Luminescent properties of GaN-based epitaxial layers and heterostructures grown on porous SiC substrates

The photoluminescence of single epitaxial GaN layers and electroluminescence of double GaN/AlGaN heterostructures grown on porous silicon carbide (PSC) substrates was studied in comparison to the properties of analogous layers and structures grown on nonporous SiC substrates. The epilayers grown on PSC substrates are characterized by a lower concentration of dislocation-related nonradiative recombination centers. It is suggested that this factor favorably influences the radiative recombination processes in device structures based on group III nitride epilayers grown on PSC substrates.