Size influence on the fluorescence decay time of ZnS:Mn^(2+) nanocrystals  

作　　者：宋京 张高峰 邢彤焱 徐建萍 张晓松 黄青松 

机构地区：[1]Tianjin Zhonghuan Neolight Technology Co.,Ltd [2]Key Laboratory of Display Materials and Photoelectric Devices,Ministry of Education,Institute of Material Physics,Tianjin University of Technology [3]Laboratory of Solid State Microstructures,Nanjing University

出　　处：《Optoelectronics Letters》2012年第1期1-3,共3页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.60877029,10904109,60977035 and 60907021);the Natural Science Foundation of Tianjin(No.09JCYBJC01400);the Tianjin Key Subject for Materials Physics and Chemistry

摘　　要：ZnS:Mn2+ nanocrystals(NCs) with particle size from 1.9 nm to 3.2 nm are synthesized via chemical precipitation method with different [S2-]/[Zn2+] ratios.The size-dependent decay for Mn emission exhibits a double exponential behavior.And two lifetime values,in millisecond time domain,can both be shortened with size increasing,which is attributed to enhanced interaction between host and Mn2+ impurity.A molecular structure model is proposed to interpret the tendency of two lifetime components,which is correlated to the number of S vacancy(Vs) defects around Mn2+.

关 键 词：Manganese compounds NANOCRYSTALS Precipitation (chemical) Zinc sulfide 

分 类 号：TN304.2[电子电信—物理电子学]