Synthesis and photoluminescent properties of ZnO:Cu/ZnO core/shell nanocrystals  

作　　者：李美惠 陈希明 徐建萍 张晓松 吴燕宇 李萍 牛喜平 罗程远 李岚 

机构地区：[1]Tianjin Key Laboratory of Film Electronic and Communication Devices,School of Electronics Information Engineering,Tianjin University of Technology [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 [4]Key Laboratory of Display Materials and Photoelectric Devices,Ministry of Education,Institute of Material Physics,Tianjin University of Technology

出　　处：《Optoelectronics Letters》2012年第4期241-244,共4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：ZnO:Cu/ZnO core/shell nanocrystals are synthesized by a two-step solution-phase process. The morphology, structure and optical properties of the samples are detected by scanning electron microscopy, Raman, absorption and luminescence spectroscopy. The increase of particle size confirms the growth of ZnO shell. The segregation of CuO phase observed in ZnO: Cu core is not detected in ZnO:Cu/ZnO core/shell nanocrystals from Raman spectra. It is suggested that some Cu ions can be segregated from ZnO nanocrystals, and the separated Cu ions can be incorporated inside ZnO shell after the growth of ZnO shell. The visible emission mechanism is discussed in detail, and the photoluminescence analysis indicates that the core/shell structure helps to eliminate the surface-related emission.

关 键 词：Heavy ions NANOCRYSTALS Optical properties Scanning electron microscopy 

分 类 号：TN304[电子电信—物理电子学]