ZnO纳米线阵列生长参数及光学性质

Studies on Growth Parameters and Optical Properties of ZnO Nanowire Arrays

通过水热法在ITO玻璃上生长ZnO纳米线阵列.种晶制备温度影响纳米线的取向性,随着温度适当升高纳米线的取向性有所提高.乙酸锌溶液浓度、生长溶液浓度及循环生长次数可以调控纳米线的尺寸.所有XRD谱中,仅存在一个很强并尖锐的纤锌矿ZnO(002)晶面衍射峰,说明ZnO纳米线具有好的结晶质量及高度的取向性.在325nm激光照射下,ZnO纳米线阵列发出强的近紫外光(378nm),证明纳米线中缺陷较少.

ZnO nanowire arrays are synthesized on ITO glass substrates by hydrothermal method. The temperature used to fabricate the ZnO seeds has an influence on the orientation of the ZnO nanowire arrays. With increasing temperature,the orientation of nanowires can be improved. The size of the ZnO nanowires can be tuned by recycling growth and the concentration of zinc acetate and reaction solutions. A sharp and strong wurtize ZnO( 002) diffraction peak is observed in XRD spectra,indicating that ZnO nanowires have a higher crystalline quality and an excellent orientation. Under the irradiation of 325 nm laser,strong UV light of 378 nm is emitted from the sample,deducing that defects are rare in the nanowires.