Atmosphere-Dependent Photoconductivity of ZnO in the Urbach Tail

Figure 1

(a) The homemade spray-pyrolysis apparatus employs compressed air as carrier gas and an aqueous solution containing zinc acetate as precursor. The pulverization allows large area film growth, and the inset illustrates a SEM image. (b) XRD data show polycrystalline film with c-axis preferential direction for ZnO as compared to ICSD pattern.

(a)

(b)