发光学报2013，Vol.34Issue(6)：686-691,6.DOI:10.3788/fgxb20133406.0686
ZnSe:Cu/CdS核壳量子点的合成及光学性能研究
Synthesis and Photoluminescent Properties of ZnSe: Cu/CdS Core/Shell Quantum Dots
摘要
Abstract
Water-soluble ZnSe∶ Cu quantum dots were synthesised in aqueous solution,ZnSe∶ Cu/CdS core/shell quantum dots(QDs) with different shell thickness were obtained in this paper.The influence of shell thickness on the optical properties of ZnSe∶ Cu QDs was studied.The samples were characterized by TEM,XRD,PL and UV-Vis.The results showed that ZnSe∶ Cu/CdS core/shell QDs have a cubic zinc-blende structure and are spherical with good dispersibility.The average grain size increased from 2.7 to 4.0 nm after the shell modification.The redshift of core/shell QDs compared with the core QDs was observed in both the UV-Vis and the PL spectra,which suggested that the size of core/shell QDs increased.The results proved that CdS shell were coated on the surface of ZnSe∶ Cu QDs and formed the ZnSe∶ Cu/CdS core/shell structure QDs.The PL intensity of the ZnSe∶ Cu QDs decreased with higher stability after being coated by CdS shell.关键词
量子点/ZnSe:Cu/ZnSe:Cu/CdS/核壳结构Key words
quantum dots(QDs) / ZnSe∶ Cu/ ZnSe∶ Cu/CdS/ core/shell structure分类
数理科学引用本文复制引用
王磊,曹立新,柳伟,苏革..ZnSe:Cu/CdS核壳量子点的合成及光学性能研究[J].发光学报,2013,34(6):686-691,6.基金项目
国家自然科学基金(51172218) （51172218）
青岛市科技发展计划(12-1-4-1-(2)-jch)资助项目 （12-1-4-1-(2）
