Figure 5From: Effects of silver impurity on the structural, electrical, and optical properties of ZnO nanowires Temperature-dependent PL spectrums from (a) 1SZO, (b) 3SZO, and (c) 5SZO NWs. A sharp strong peak originated from the NBE (the exciton bound to neutral acceptor) of the ZnO-based NWs was observed at about 3.351, 3.356, and 3.358 eV, respectively.Back to article page