CdTe/CdS核/壳结构纳米晶量子点的结构及荧光性能  

Study on the Structure and Fluorescence Performance of CdTe/CdS Core/shell Nanocrystalline Quantum Dots

作　　者：夏媛[1,2] 费学宁[1,2] 贾国治[3] 刘音[4] 王晓阳[1,2] 王军[1,2] 

机构地区：[1]天津城市建设学院环境与市政工程系,天津300384 [2]天津城市建设学院天津市水质科学与技术重点实验室,天津300384 [3]天津城市建设学院基础学科部,天津300384 [4]天津大学化工学院,天津300072

出　　处：《天津城市建设学院学报》2011年第2期123-126,131,共5页Journal of Tianjin Institute of Urban Construction

基　　金：国家自然科学基金(21072147);天津市自然科学基金(09JCYBJC04100)

摘　　要：采用水相合成法,制备出核/壳结构CdTe/CdS纳米晶量子点,用红外光谱和X射线衍射对其结构进行了表征,并对CdTe纳米晶量子点光稳定性以及CdTe/CdS纳米晶量子点荧光特性影响因素进行了研究.结果表明:随着放置时间的增加,CdTe量子点的光学稳定性下降;随着反应时间的增加和壳/核比例的增加,CdTe/CdS纳米晶量子点的荧光发射波长均发生红移;且反应时间增加,荧光强度增强;当CdS与CdTe壳/核比例为2∶1时,荧光强度最强.The core/shell structure CdTe/CdS nanocrystalline quantum dots are synthesized in water-phase and characterized by infrared spectrum（IR） and X ray diffraction（XRD）.The light stability of CdTe nanocrystalline quantum dots and the influencing factors of CdTe/CdS nanocrystalline quantum dots fluorescence characteristics are both studied.The results show that the optical stability of CdTe quantum dots decreases with the increase of placing time;CdTe/CdS nanocrystalline quan-tum dots fluorescence emission wavelength shows redshift with the increase of reaction time and proportion of shell/nuclear;the fluorescent intensity increases as the reaction time increases;when the proportion of CdS/CdTe shell/core is 2∶1,the strongest fluorescence intensity is obtained.

关 键 词：CdTe/CdS纳米晶量子点 光学稳定性 壳/核比 

分 类 号：O471[理学—半导体物理]