Project supported by the National Natural Science Foundation of China (Grant No. 11004092) and the Scientific Research Fund of Education Department of Liaoning Province, China (Grant No. 2009A417).
yb3+/Dy3+ co-doped A1203 nanopowders have been prepared by the non-aqueous sol-gel method and their up- conversion photoluminescence spectra are measured under excitation by a 980-nm semiconductor laser. The results...