Blue-Light Emission from Nanocrystalline La0.5Na0.5TiO3
ZHANG Wei-feng1, ZHANG Xing-tang2, YIN Zhen1, ZHANG Ming-sheng1, MA Guo-hong2, DU Zu-liang2
1Center for Materials Analysis and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093
2Department of Physics, He’nan University, Kaifeng 475001
Blue-Light Emission from Nanocrystalline La0.5Na0.5TiO3
1Center for Materials Analysis and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093
2Department of Physics, He’nan University, Kaifeng 475001
Abstract： Nanocrystalline La0.5Na0.5TiO3 powders were prepared by the stearic acid-gel method, and the grain sizes could be controlled by varying annealing temperatures. The sizes were determined to be from 14 to 50nm using Scherrer's formula. A very strong blue-light emission band around 480nm was clearly observed in the nano-sized La0.5Na0.5TiO3 with a grain size of 14nm at room temperature. Also, nano-size effects on the luminescence properties were investigated. These results could be explained with the aid of a self-trapped exciton model.
1998, Vol. 15 
