CdTe纳米晶及层状纳米晶薄膜的生长及其光荧光性质  

Layer by layer growth of CdTe nanocrystal thin films and its photoluminescence

作　　者：戴明[1] 廖远宝[1] 刘东[1] 甘新慧[1] 徐岭[1] 马忠元[1] 徐骏[1] 陈坤基[1] 

机构地区：[1]南京大学物理系,固体微结构物理国家重点实验室,南京210093

出　　处：《物理学报》2009年第10期7246-7249,共4页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10874070,50872051);江苏省自然科学基金(批准号:BK2008253,BK2007135);国家重点基础研究发展计划(批准号:2007CB935401,2007CB613401)资助的课题~~

摘　　要：用湿化学法在水溶液中合成了单分散的、大小尺寸可控的、巯基包裹的胶体CdTe纳米晶体,并利用CdTe纳米晶体和双功能分子poly(diallyldimethylammonium chloride)(PDDA)在Si衬底表面自组织生长了有序的层状纳米晶薄膜,荧光光谱研究了层状纳米晶体之间的共振能量迁移过程.结果表明:层状自组织生长的样品中纳米晶粒的间隔几乎一样,表明它们是有序排列的;而用直接干燥形成的样品中,小尺寸和大尺寸的纳米晶体之间间隔较短,发生荧光共振能量迁移,较小尺寸的纳米晶粒荧光峰(即波长较短处的晶粒荧光峰)部分淬灭,较大尺寸的荧光峰(即波长较长处的晶粒荧光峰)加强,使得PL谱出现明显的红移现象.We synthesized size-controlled,uniformly distributed,and thioglycolic-stabilized CdTe nanocrystals by wet chemistry method.The multilayer nanocrystals were assembled on Si substrate by bifunctional linker molecule and the resonance energy transfer between different sized CdTe nanocrystals embedded in gelatin film was investigated.The results showed that the multilayer nanocrystals were in a good order because the distance between the layers was nearly the same.The distance between different sized nanocrystals was relatively short in the directly dried sample. We can observe the resonance energy transfer by the red shift in its photoluminescence.

关 键 词：CdTe纳米晶体 量子限制效应 共振能量迁移 

分 类 号：TB383.1[一般工业技术—材料科学与工程]