Structural Characteristics and Photoluminescence of Zinc Oxide
Nanocrystals
DU Yu-Lei1, ZHANG Ming-Sheng1, DENG Yu1, CHEN Qiang1, YIN Zhen1, CHEN Wan-Chun2
1National Laboratory of Solid State Microstructures and Center for Materials Analysis, Nanjing University, Nanjing 210093
2Institute of Physics, Chinese Academy of Sciences, Beijing 100080
Structural Characteristics and Photoluminescence of Zinc Oxide
Nanocrystals
DU Yu-Lei1;ZHANG Ming-Sheng1;DENG Yu1;CHEN Qiang1;YIN Zhen1;CHEN Wan-Chun2
1National Laboratory of Solid State Microstructures and Center for Materials Analysis, Nanjing University, Nanjing 210093
2Institute of Physics, Chinese Academy of Sciences, Beijing 100080
Abstract： We have prepared zinc oxide nanocrystals using a new type of solid-state reaction. The nanosized grains were obtained by changing the heat treatment temperature and the sizes were determined to be from 10 to 42 nm. The lattice vibrational Raman spectra were measured and assigned at different grain sizes. We observed a strong visible emission centered at 580 nm in the nanosized ZnO at room temperature. We have investigated the photoluminescence properties under different grain sizes after annealing. The weakening of the luminescence is attributed to the decrease of intrinsic structural defects, mainly, oxygen vacancies and the increase of the grain size in the nanocrystals.
2002, Vol. 19 
