摘要
采用溶液法在覆载有种子层的导电玻璃上制备了氧化锌纳米棒阵列。用X射线衍射(XRD)、扫描电子显微镜(SEM)和光致发光谱(PL)研究了样品的结构形貌和光学性质。结果表明:当生长液浓度较高时,氧化锌纳米棒阵列容易发生堆叠。随着生长液浓度的降低,纳米棒阵列变疏松,取向性增强;XRD结果显示各样品的(002)衍射峰都较强,如果反应液浓度降低,取向性会受到影响,与SEM结果吻合;溶液法制备的氧化锌纳米棒有优良的光致发光特性,其PL光谱由激子峰和缺陷峰组成。当生长液浓度较低时,激子峰和缺陷峰都比较弱;随着生长液浓度的增加,激子峰和缺陷峰的强度均先增大后减小,即存在一个最佳浓度;氧化锌纳米棒的取向对发光有一定影响。
In the bath environment at constant temperature,ZnO nanorod arrays were grown by seed-aided aqueous solution method on FTO substrates. X-ray diffraction( XRD),scanning electron microscopy( SEM) and photoluminescence spectrum( PL) were used to characterize the crystal structures,morphology and optical properties of the ZnO nanorod arrays. SEM results show that the ZnO nanorod arrays are dense arranged and disorientation with high concentration of growth solution. With the decreasing of the concentration of growth solution,the ZnO nanorod arrays become sparce and show better orientation. XRD pattern indicates that the( 002) diffraction peaks of all the samples are strong. The orientation of the nanorod arrays was affected when the concentration of growth solution reduces which is consistent with the results of SEM. Optical study reveals that the ZnO nanorod arrays have a UV exciton peak and a green defect peak. When the concentration of growth solution is low,both the peaks are weak. With the increasing of the concentration,the photoluminescence intensity of both peaks increases first and then decreases which means there is a best concentration. The orientation of the nanorod arrays has some influence on the photoluminescence property.
出处
《南阳理工学院学报》
2014年第3期108-111,共4页
Journal of Nanyang Institute of Technology
基金
河南省教育厅科技攻关计划项目(12B430017)
河南省教育厅科学技术研究重点项目(14B430029)
河南省基础与前沿基础研究项目(122300410205)
南阳市科技攻关项目(2010GG023)
关键词
氧化锌纳米棒阵列
溶液法
光致发光特性
激子峰
缺陷峰
ZnO nanorod arrays
aqueous solution method
photoluminescence property
exciton peak
defect peak
