==== QFIRS Seminar ==== **Speaker: M.Sc. Rodrigo de Vasconcellos Lourenço (TU Braunschweig)**\\ **February 15th, 2024**\\ **15:00 - 16:00 **\\ **AEI Seminar room 103 (Callinstr.38, 30167 Hannover)**\\ **Title** \\ Control of point defect density in GaInN/GaN quantum wells: The underlayer as a diffusion barrier, regardless of its composition.\\ **Abstract** \\ Welcome to explore one important mechanism that affects the point defect density in the active region of light-emitters. This talk is aimed at presenting evidences for point defect diffusion, and hence how to control the defect density in GaInN/GaN quantum wells by using proper growth conditions. Thus, it offers a new perspective on the reduction of defects, allowing further development and design of more efficient light-emitting nanostructures. \\