Abstract
A tunable luminescence from red to blue in Eu-doped mesoporous AlPO4 glass is
achieved by adjusting the annealing temperature. With increasing annealing
temperature, the increased Eu3+ ions reduction changes the luminescence of the
obtained glass. The abnormal reduction of Eu3+ to Eu2+ occurs in AlPO4 mesoporous
glass at relative low annealed temperatures from 600 to 800 oC in air. The presence
of Eu2+ ions, which are reduced from Eu3+ 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.
© 2014 Chinese Optics Letters
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