Abstract
In this paper, ZnO nanosheets were grown on glass substrates by using an aqueous solution at room temperature. It was found that the ZnO nanosheets were structurally uniform and well oriented with the wurtzite structure. The field emission performance of ZnO nanosheets can be greatly enhanced by illuminating UV light. It was found that the turn-on electric field can be reduced from 5.9 to 5.0 V/μm and field enhancement factors (β) can be increased from 1966 to 4202. It is attributed to generate a large number of electrons by UV illumination.
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