Temperature mapping of Al0.85In0.15N/AlN/GaN high electron mobility transistors through micro-photoluminescence studiesM. Gonschorek, D. Simeonov, J.-F. Carlin, E. Feltin, M. A. Py and N. GrandjeanEur. Phys. J. Appl. Phys., 47 3 (2009) 30301DOI: https://doi.org/10.1051/epjap/2009091