Abstract
Zinc oxide (ZnO) nanocrystalline with different morphologies, used in ultraviolet (UV) light detection, was successfully fabricated by directly oxidizing metallic zinc at high temperature. X-ray diffraction spectra show that the as-prepared samples are hexagonal wurtzite structure. Scanning electron microscopy images indicate that ZnO with different morphologies such as comb-like, tetrapod and bullet structures could be controlled by simply variables like gas flow rate, ambient pressure and growth temperature. The Photoluminescence (PL) spectra were employed to reveal native point defects in ZnO nanocrystalline. The UV detection properties of ZnO nanocrystalline films screen-printed on interdigital electrodes were investigated by observing the changes of capacitance and conductance under different light sources. The results indicate that the comb-like ZnO nanocrystalline has high UV sensitivity.
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