Influence of the AlN molar fraction on the structural and optical properties of praseodymium-doped AlxGa1-xN (0<=x<=1) alloys. - Marco Peres; Sérgio Magalhães; Nuno Franco; M. J. Soares; Armando J. Neves; Eduardo Alves; Katharina Lorenz; Teresa Monteiro (Microelectron. J., 2009)