Abstract
Highly ordered and uniform vertical ZnO nanorod arrays were synthesized by a facile and low-temperature sol-gel method using two different seed layers [i.e., Mg-doped ZnO (MZO) and Al, Mg-doped ZnO (AMZO)] and deposited by spin coating technique. Field-emission scanning electron microscopy images confirmed that vertical, denser, and orderly ZnO nanorods are grown on AMZO seed layer compared with that synthesized on MZO seed. UV-visible spectra indicated that Al and Mg additives could significantly enhance the optical transparency and induce a blueshift in optical band gap of ZnO films. The electrical property shows that ZnO nanorods grown on AMZO seed have lower resistivity of 2.30 Omega cm than that on MZO seed (7.67 Omega cm). The electrical conductivity of ZnO films grown on co-doped seed layer could be tailor and this might be effectively inducing the geometric growth of ZnO films by sol-gel.