Enhanced luminescence of Dy3+ in Y3Al5O12 by Bi3+ co-doping

► Energy transfer from Bi3+ to Dy3+ was observed in Bi3+ and Dy3+ co-doped Y3Al5O12. ► Luminescent intensity of Dy3+ can be enhanced by ∼7 times by co-doping of Bi3+. ► Mechanism of energy transfer from Bi3+ to Dy3+ was discussed.