水热合成ZnTe纳米粉的发光性能  

Photoluminescence Properties of ZnTe Nanopowder Synthesized by Hydrothermal Method

作　　者：徐幸梓[1,2] 王必本[1,2] 陈玉安[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]重庆理工大学化学化工学院,重庆400054

出　　处：《发光学报》2011年第5期428-432,共5页Chinese Journal of Luminescence

基　　金：重庆市自然科学基金(CSTC;2009BA4027)资助项目

摘　　要：利用Zn粉和Te粉为原材料,通过水热法在160℃下合成了ZnTe纳米粉,并用X射线衍射仪、X射线能谱仪、透射电子显微镜和显微Raman光谱对其进行了表征。X射线衍射谱表明合成的ZnTe具有闪锌矿结构。X射线能谱给出的结果表明合成的ZnTe中主要元素是Zn和Te,并含有杂质O。透射电子显微镜照片显示出合成的ZnTe纳米粉颗粒不均匀,其大小为8～160nm,并且小颗粒ZnTe发生了聚集。Raman谱在206,411,615cm^(-1)处显示出ZnTe的3个纵向光学声子振动模式。在室温下对ZnTe纳米粉的发光性能进行了研究,其荧光谱在535.6nm处显示出弱的施主-受主对的复合发光,在581,699nm处分别显示出与Zn空位-杂质缺陷联合体和等电中心氧俘获有关的强发光峰。利用有关理论解释了室温下施主-受主对的复合辐射。ZnTe nanopowder was synthesized at 160℃by hydrothermal method,in which the zinc and tellurium powders were used as the precursors.The powder was characterized by X-ray diffraction,X-ray energy dispersive spectroscopy,transmission electron microscopy and micro-Raman spectroscopy.The X-ray diffraction pattern indicates that the synthesized ZnTe particles are zine blend structure.The X-ray energy dispersive spectrum exhibits that the main elements in the ZnTe nanopowder are zine and tellurium and the impurity is oxygen. The image of transmission electron microscopy shows that the particles in the powder are diversified in size ranging from about 8 to 160 nm and the small particles aggregate easily.Raman spectrum shows there are three longitudinal optical phonon vibration modes of ZnTe centered at about 206,411,615 cm（-1）.The photoluminescence of ZnTe nanopowders was investigated at room temperature.The photoluminescence spectrum shows the weak recombination emission of donor-acceptor pairs presented at about 535.6 nm and the strong emission bands related to the complex defects containing Zn vacancies and impurity as well as isoelectronic oxygen trap at about 581,699 nm,respectively.The recombination emission of donor-acceptor pairs at room temperature is reasonably explained by the related theory.

关 键 词：水热法 ZnTe纳米粉 RAMAN谱 发光 

分 类 号：O482.31[理学—固体物理]