Aerospace’s Photonics Technology Department has developed and utilized a photoluminescence spectroscopy laboratory with a suite of experimental techniques, including time- and energy-resolved photoluminescence spectroscopies, to characterize semiconductor material and device performance. Time-resolved photoluminescence (TRPL) and steady-state photoluminescence (SSPL) respectively provide time- and energy-resolved information about radiative recombination of carriers in semiconductor materials.