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(a) SEM image of vertical ZNT arrays grown on ITO substrate. Inset: XRD data and transmission electron microscopy electron diffraction pattern indicate the single crystalline structure of ZNT. (b) Schematic of the two-terminal suspended measurement system.
characteristics of ZNT under dark condition (circles), illuminated by a UV light source (squares) and 1 h after the UV light was turned off. Inset is the schematic of the ITO-ZNT-metal hybrid structure.
(a) Illumination power normalized single ZNT conductance (open circle) as a function of excitation wavelength. The sum of two Gaussian peaks (dotted curves) with and yields a good fit (solid curve) to the data. Inset is the PL spectrum taken from a ZNTs film. (b) Energy diagram of the band structure of the neutral or doubly ionized defect localized states.
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