Figure 5

Temperature-dependent PL spectra from (a) 1, (b) 3, and (c) 5 at.% SAZO NWs. The temperature dependence of PL of the SAZO provides the reference for the PL analysis of the co-doped ZnO NWs, in which dominant peaks of the exciton bound to the neutral acceptor are clearly found at 3.355 and 3.356 eV for 3 and 5 at.% SAZO NWs, respectively. It demonstrates the successful Ag doping into the ZnO structure with both 3 and 5 at.% Ag/Al co-doping conditions.