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应用两步法在玻璃衬底上制备了高度取向的ZnO纳米棒,并研究了衬底和反应时间等参数对其结构及发光特性的影响。从样品的扫描电镜(SEM)图中发现,利用脉冲激光沉积(PLD)方法在玻璃衬底上生长一层ZnO薄膜作为修饰层,可以明显提高水热法生长的ZnO纳米棒的结晶质量。样品的SEM和光致发光(PL)谱表明,在有ZnO修饰层的玻璃衬底上生长的ZnO纳米棒分布均匀,排列致密,取向性好;缺陷发光的发光强度约是激子发光峰的2倍,且随着反应时间增长,样品的缺陷发光增强而激子发光减弱。
Two-step method was used to prepare highly oriented ZnO nanorods on a glass substrate. The effects of substrate and reaction time on the structure and luminescence properties were also studied. It is found from SEM images of the samples that the growth of ZnO thin film as a modified layer on a glass substrate by pulsed laser deposition (PLD) can obviously improve the crystal quality of ZnO nanorods grown by hydrothermal method. The SEM and PL spectra of the samples show that the ZnO nanorods grown on glass substrates with ZnO modified layer have uniform distribution, dense arrangement and good orientation. The luminescence intensity of the defect luminescence is about 2 Times, and with the increase of reaction time, the defect of the sample enhanced the luminescence and the exciton luminescence weakened.