In order to make a Schottky contact between metal and semiconductor material. The work function of the metal must be greater than to the work function of semiconductor material, for example, Silver (with a work function of 4.24-4.71) will form an ohmic contact to Zinc oxide material (with a work function of approx. 5) and Gold will form Schottky contact (5.11). However based on some related literature (doi: 1757-899X/149/1/012069). Silver contact form rectifying behavior on Zinc Oxide film deposited on a polymeric substrate. So I'm not sure if Silver can form Schottky contact with zinc oxide film (assume that the substrate is glass)?
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Based on your reference, if it forms a rectifying IV, it probably is a Schottky contact, assuming decent contact litho and processing.
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$\begingroup$ Did you saw the I-V curve based on the reference? I'm just confused about how metal contact or what metal contact do I need to form schottky contact? thanks! $\endgroup$ – Rolly Nov 30 '17 at 5:24
