Figure 5
XRD patterns at increasing heating temperatures for films exposed at different X-ray doses: (a) not exposed; (b) 89 J cm−2; (c) 178 J cm−2 and (d) 356 J cm−2. The asterisks (*) indicate the ZnO* crystalline phase (PDF #21-1486), the hash marks (#) indicate the intermediate f.c.c. crystalline phase and the hollow dots (o) indicate the wurtzite-like ZnO crystalline phase (PDF #80-0074). |