| Summary: | 碩士 === 國立臺南大學 === 電機工程研究所 === 98 === In this study we investigate the influence of field emission properties of the ZnO nanowires after being illuminated by UV light. We also compared the effect of different illumination (1.9 mW/cm2 and 3.2 mW/cm2) and different wavelength (UV-A：320-400 nm, UV-B：280-320 nm, UV-C：200-280 nm) of UV light. We discovered that more illumination could enhance more emission current, and reduce the turn–on voltage. However, UV-A light had stronger ability to enhance emission current.
Then we measured three kinds of UV light at different pressure. It is observed that emission current of UV-A light had less fluctuation among different pressure. The others would decay more when environmental elements were worse.
We also investigated the recovery current of three kinds of UV light. All of them took much time (20 min) for emission current to fall to its original value.
After measuring the current characteristics, the stability of field emission was also investigated.
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