Effect of barrier composition fluctuation on luminescence properties of AlGaAs/GaAs single quantum wells - Lourenço, Sidney Alves; Duarte, J L; Silva, M A T da; Dias, I F L; Duarte, J L; Laureto, E; Lamas, T. E.; Quivy, Alain André (Encontro Nacional de Física da Matéria Condensada, 2007)