Effect of defect clusters on the persistent luminescence of 'CD''SI''O IND. 3':'PR POT. 3+' - Rodrigues, Lucas Carvalho Veloso; Carvalho, José Miranda de; Laamanen, Taneli; Lastusaari, Mika; Hölsä, Jorma; Nunes, Luiz Antônio de Oliveira; Brito, Hermi Felinto de (International Conference on the Physics of Optical Materials and Devices - ICOM, 2012)