摘要
Novel Dy3＋-doped GdPO4 white light phosphors with monoclinic system were successfully synthesised by hydrothermal method at 240℃. This paper investigates the luminescence properties of white-light Gd1-xPO4 ： xDy3＋ under vacuum ultraviolet （VUV） excitation. The strong absorption at around 147 nm in excitation spectrum energy can be transferred to the energy levels of Dy3＋ ion from the host absorption. Additionally, this white light phosphors are activated by a single Dy3＋ ion and with a lower preparation temperature, which tend to decrease the consumption of rare earth resource and energy. Therefore, the luminescence of Gd1-xPO4 ： xDy3＋ under VUV excitation is effective, and proves to be promising in application to mercury-flee lamp.
Novel Dy3＋-doped GdPO4 white light phosphors with monoclinic system were successfully synthesised by hydrothermal method at 240℃. This paper investigates the luminescence properties of white-light Gd1-xPO4 ： xDy3＋ under vacuum ultraviolet （VUV） excitation. The strong absorption at around 147 nm in excitation spectrum energy can be transferred to the energy levels of Dy3＋ ion from the host absorption. Additionally, this white light phosphors are activated by a single Dy3＋ ion and with a lower preparation temperature, which tend to decrease the consumption of rare earth resource and energy. Therefore, the luminescence of Gd1-xPO4 ： xDy3＋ under VUV excitation is effective, and proves to be promising in application to mercury-flee lamp.
基金
Project supported by the Combination of Industry and Research by the Ministry of Education and Guangdong Province (Grant No 0712226100023)
