This project proposes to use nitride nanowires to achieve effective UV sources using core/shell quantum wells, obtained by MOCVD growth (Metal-Organic Chemical Vapor Deposition). The nanowire geometry should improve significantly the luminescence efficiency by avoiding dislocation formation, while ensuring an excellent light extraction. The objective of this project is to estimate the real efficiency gain of luminescence, to better understand the potential of nanowires for UV applications. This project represents a new fundamental research focus on nitrides nanowires.