Enhanced ultraviolet emission from ZnS-coated ZnO nanowires fabricated by self-assembling method.
A simple chemical route for ZnS-coated ZnO nanowires with preferential (002) orientation is reported. Sodium sulfide and zinc nitrate were employed to supply S and Zn atoms at 60 degrees C to form ZnS-coated ZnO nanowires structures. Electron diffraction measurement shows that the ZnO/ZnS core-shell nanostructure is single crystalline. Interesting features are found in the photoluminescence (PL) spectra of ZnS-coated ZnO nanostructures. After coating, the UV emission of nanorods is dramatically enhanced at the expense of the green emission. The core/shell structure with higher band gap shell material and reduced surface states should be responsible for this PL enhancement.
Li
Jinhua
J
Key Laboratory of Excited-State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences (CIOMP), 16 East Nan-Hu Road, Open Economic Zone Changchun 130033, People's Republic of China.
Zhao
Dongxu
D
Meng
Xiuqing
X
Zhang
Zhenzhong
Z
Zhang
Jiying
J
Shen
Dezhen
D
Lu
Youming
Y
Fan
Xiwu
X