| Summary: | 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 Ω cm than that on MZO seed (7.67 Ω 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. © 2016 The Authors.
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