Made available in DSpace on 2022-04-29T07:13:17Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-12-01; The purpose of the present chapter is to join both the experimental and theoretical results to explain the different responses of photoluminescence (PL) emission at room temperature of ZnO powders by using different structural order-disorder effects, associated with intermediate and short range defects....