Enhanced NIR emission in Ce3+/Er3+-doped YAG induced by Bi3+ doping
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摘要:
Ce3+/Er3+/Bi3+ triply-doped yttrium aluminum garnet (YAG) is synthesized using co-precipitation method.The Bi3+ concentration-dependent near-infrared (NIR) emission behavior is systemically investigated.The NIR emission of Er3+ ions at 1531 nm is enhanced threefold by the addition of 7 mol% Bi3+.Bi3+doping results in the formation of exciton in YAG and the variation in the local environment of the doped rare-earth ions.The enhancement in NIR luminescence is ascribed to the combined effects of the sensitization of exciton→Ce3+ →Er3+ and the Bi3+ doping-induced adjustment of the local environment for Ce3+ and Er3+ ions.