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The 15TiO 2 –85SiO 2 glass containing Eu 3+ ions was prepared by sol–gel method. The excitation spectrum in the range from 220 to 360nm exhibits the absorption of the charge-transfer bands of the Eu 3+ and Ti 4+ ions, indicating an energy transfer from the Ti charge-transfer band to the Eu 3+ ions. The emission spectrum consists of the transitions from...
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