Schematic diagrams of the energy band structures of ZnO and Ag metal, (a) before contact and (b) after contact.
RBS spectra obtained from thin films as a function of Ag layer thickness: (a) whole range spectrum for 8 and thin films and (b) just ZnO and Ag peaks shown for at each thickness of Ag.
Resistivity and sheet resistance of the thin films as a function of Ag layer thickness.
Carrier concentration of the thin films as a function of Ag thickness. The inset shows the carrier concentration of thin films with Ag thicknesses.
Hall mobility of thin films as a function of (a) Ag layer thickness and (b) carrier concentrations.
rms surface roughness of multilayer as a function of Ag thicknesses.
Schematic of growth stage of Ag films and carrier transport as a function of Ag layer thickness.
Cross section TEM micrographs of thin films with varying Ag thickness: (a) , (b) , and (c) .
AFM surface morphology of Ag on for different Ag thicknesses (left: amplitude images and right: topography images): (a) , (b) , and (c) .
Optical transmittance spectra from thin films on PET or on quartz slides as a function of Ag thickness: (a) thin films on PET and (b) thin films on quartz slides.
Optical reflectivity spectra from thin films on quartz slides as a function of Ag thickness.
Optical band-gap energy of pure single-layer ZnO and ZnO multilayer films on quartz slides and PET substrates: (a) thin films on quartz slides and (b) thin films on PET.
Optical band gap of ZnO multilayer films as a function of Ag thickness. The inset shows band-gap energy as a function of the carrier concentration.
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