Luminescent properties and energy transfer of double-emitting NaSrPO4:Eu2+,Tb3+ phosphor for near-UV white LEDs

►We found a promising double-emitting phosphors NaSrPO4:Eu2+,Tb3+. ► As synthesized materials can be used for LED phosphor application. ► The energy transfer mechanism from Eu2+ to Tb3+ has been observed and demonstrated.