摘要
A tunable luminescence from red to blue in Eu-doped mesoporous AIPO4 glass is achieved by adjusting the annealing temperature. With increasing annealing temperature, the increased Eu^3＋ ions reduction changes the luminescence of the obtained glass. The abnormal reduction of Eu^3＋ to Eu^2＋ occurs in A1PO4 mesoporous glass at relative low annealed temperatures from 600 to 800 ~C in air. The presence of Eu^2＋ ions, which are reduced from Eu^3＋ by hole-electron pairs, is revealed by XPS spectra. Our results indicate the mesoporous AlPO4 glass is a suitable matrix to incorporate Eu ions as the tunable luminescent light sources or LEDs.
A tunable luminescence from red to blue in Eu-doped mesoporous AIPO4 glass is achieved by adjusting the annealing temperature. With increasing annealing temperature, the increased Eu^3＋ ions reduction changes the luminescence of the obtained glass. The abnormal reduction of Eu^3＋ to Eu^2＋ occurs in A1PO4 mesoporous glass at relative low annealed temperatures from 600 to 800 ~C in air. The presence of Eu^2＋ ions, which are reduced from Eu^3＋ by hole-electron pairs, is revealed by XPS spectra. Our results indicate the mesoporous AlPO4 glass is a suitable matrix to incorporate Eu ions as the tunable luminescent light sources or LEDs.
基金
financially supported by the National Natural Science Foundation of China(Nos.51072207 and 61275208)
the Shanghai Natural Science Foundation(No.11ZR1441500)
Li acknowledges the financial support from National Youth Natural Science Foundation of China(No.61108062)
