Excellent Characteristics of ZnO Nanowires Synthesized by Two Step Method (Chinese)
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摘要: 利用热蒸发和溶液浸泡两步法制备了性能优良的ZnO纳米线，研究了这些ZnO纳米线的光致发光和场发射特性.与直接采用热蒸发方法生长的ZnO纳米线相比，由该方法得到的ZnO纳米线表现出了更好的紫外发光特性，同时发生5 nm的蓝移，场发射测试表明其开启电场和阈值电场分别达到2.3 V/μm和6.8 V/μm.该方法适用于制备光致发光和场发射性能优良的ZnO纳米线.Abstract: ZnO nanowires with excellent properties were synthesized by twostep method. Photoluminescence (PL) measurements showed that the ZnO nanowireshave stronger ultraviolet emission properties at 376 nm and there is a 5 nm blue shift after being immersed in thiourea (TU) solution compared with those of without immersion. The immersed ZnO nanowires show a turnon field of 2.3 V/μm at a current density of 0.1 μA/cm2 and emission current density up to 1 mA/cm2 at an applied field of 6.8 V/μm, which are 2.7 V/μm and 7.9 V/μm for those of without being immersed, respectively. So this method may be an effective method to improve the characteristics of ZnO nanowires.
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Key words:
- ZnO nanowiresphotoluminescencefield emission /
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